What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London round-trip?

Flying on Icelandair is currently your cheapest option to London, with prices starting at $598. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Air Canada, with the lowest prices starting at $601 and $602, respectively. You may be able to fly from Chicago O'Hare Intl Airport to London for 21% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London one-way?

One-way options have recently been found by users for as low as $271 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $277 and Iberia from $379 one-way.

What are the most popular routes from Chicago O'Hare Intl Airport to London?

Most travelers choose Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City when deciding on the best route from Chicago O'Hare Intl Airport to London.

What are the cheapest flights from Chicago O'Hare Intl Airport to London?

Looking at all options, your cheapest flight can be booked for $408. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $519 on average our data indicates $2,643 when flying from Chicago O'Hare Intl Airport to London.

What are the most reliable airlines from Chicago O'Hare Intl Airport to London?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to London on time: Royal Jordanian (88%), Gulf Air (82%), Malaysia Airlines (79%).

What are the most popular airlines that fly from Chicago O'Hare Intl Airport to London?

The most popular airlines flying from Chicago O'Hare Intl Airport to London are American Airlines, Air Canada and Alaska Airlines. Something to consider prior to booking your flight.

Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?

Chicago O'Hare Intl Airport to London flights have a layover in Reykjavik most often. Reykjavik is followed by Copenhagen in terms of the most popular layover location on flights from Chicago O'Hare Intl Airport to London.

Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?

Chicago O'Hare Intl Airport to London flights have a layover in Dublin least often.

What are some popular things to do or see while on a layover in Reykjavik?

The majority of Reykjavik visitors spend their time at Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $49 per day to make their sightseeing more efficient.

What are some popular points of interest to see during a layover in Copenhagen?

Copenhagen travelers tend to visit Tivoli, Kongens Nytorv, and Rådhuspladsen more than any other notable places. Tivoli, Kongens Nytorv and Rådhuspladsen are located about 5.3 mi, 5.1 mi, and 5.2 mi, respectively from Kastrup Copenhagen if you are interested in checking them out. Travelers can rent a car at Kastrup Copenhagen for an average daily rate of $35 to make sightseeing during their layover a little easier.

What is the cheapest day to fly round-trip from Chicago O'Hare Intl Airport to London?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 14% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 60 days in advance, which can save you up to 7% on flights from Chicago O'Hare Intl Airport to London compared to booking the week you need them. Waiting 60 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $708. For sooner than that we have options available in the next 3 days from $714.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to London?

February is one of the best times of the year to fly to London from Chicago O'Hare Intl Airport. Prices for February average $748 per person but you can even find prices for as low as $473. The most expensive prices can be found in the month of June. Opting for a February flight can save you 32% on your journey compared to booking in June

Most accurate provider : When it comes to deals on Chicago O'Hare Intl Airport-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago O'Hare Intl Airport-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Chicago O'Hare Intl Airport-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from O'Hare Intl to London that include hotel bookings?

Yes. In addition to deals on O'Hare Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from O'Hare Intl to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to London.

Can I find deals for business class flights from O'Hare Intl to London?

Yes. Cheapflights offers flight deals from O'Hare Intl to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$267+ Flights from Chicago O'Hare Intl Airport to London

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in April or February, booked 48 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from O'Hare Intl to London

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$552 (Norse)
One-way from	$267 (Norse)
Popular in	June
Cheapest in	April
Average price	$652
Good round-trip deal	$677 or less
Good one-way deal	$495 or less

Provider with most accurate pricing for Chicago O'Hare Intl-London (LON) flight deals.

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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-London (LON) flights.

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From Chicago O'Hare Intl to London (LON)

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One-way flight from Chicago O'Hare Intl to London (LON)

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Highest demand for flights based on searches. 15% potential increase in price ($142 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).

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Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).

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Find flight deals from O'Hare Intl to London

Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Tue 8/57:25 pmORD - LHR

1 stop10h 30mIcelandair

Tue 8/199:25 pmLHR - ORD

1 stop29h 50mIcelandair

Deal found 4/16

$573

Tue 5/67:47 pmORD - LGW

3 stops33h 58mMultiple Airlines

Tue 5/132:00 pmLGW - ORD

2 stops24h 50mMultiple Airlines

Deal found 4/17

$599

Tue 9/237:15 pmORD - LHR

1 stop14h 45mScandinavian Airlines

Wed 10/15:00 pmLHR - ORD

1 stop29h 10mScandinavian Airlines

Deal found 4/16

$600

Mon 9/110:15 pmORD - LGW

1 stop10h 20mIcelandair

Wed 9/173:40 pmLGW - ORD

1 stop11h 35mIcelandair

Deal found 4/17

$600

Mon 8/44:00 pmORD - LHR

1 stop10h 35mAir Canada

Thu 8/149:30 amLHR - ORD

1 stop11h 21mAir Canada

Deal found 4/17

$602

Wed 9/242:08 pmORD - LHR

1 stop10h 22mMultiple Airlines

Wed 10/86:00 amLHR - ORD

1 stop12h 10mMultiple Airlines

Deal found 4/15

$606

Tue 8/53:16 pmORD - LHR

1 stop10h 34mIberia

Wed 8/202:25 pmLHR - ORD

Nonstop8h 35mIberia

Deal found 4/17

$607

Tue 5/65:40 pmORD - LHR

Nonstop7h 40mBritish Airways

Tue 5/139:15 amLHR - ORD

Nonstop8h 30mBritish Airways

Deal found 4/17

$608

Tue 5/137:05 pmORD - LHR

1 stop11h 55mSWISS

Tue 5/208:45 amLHR - ORD

1 stop13h 10mSWISS

Deal found 4/16

$611

Tue 5/67:25 pmORD - LTN

2 stops21h 30mMultiple Airlines

Wed 5/1411:25 amLTN - ORD

2 stops32h 10mMultiple Airlines

Deal found 4/16

$613

Tue 5/63:45 pmORD - LHR

1 stop10h 15mAer Lingus

Tue 5/137:40 amLHR - ORD

1 stop12h 20mAer Lingus

Deal found 4/16

$617

Mon 9/226:10 pmORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Tue 10/214:25 pmLGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 4/17

$621

Best flights from O'Hare Intl to London
Discover carefully curated flight deals from O'Hare Intl to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2025.

Tue 7/157:00 amORD - LGW

1 stop18h 00mMultiple Airlines

Tue 9/92:00 pmLGW - ORD

1 stop35h 58mMultiple Airlines

Deal found 4/16

$552

Sat 9/67:25 pmORD - LHR

1 stop10h 30mIcelandair

Mon 10/61:05 pmLHR - ORD

1 stop11h 10mIcelandair

Deal found 4/17

$598

Mon 9/297:15 pmORD - LHR

1 stop16h 25mScandinavian Airlines

Tue 10/1410:20 amLHR - ORD

1 stop11h 50mScandinavian Airlines

Deal found 4/17

$601

Mon 8/44:00 pmORD - LHR

1 stop10h 35mAir Canada

Fri 8/159:30 amLHR - ORD

1 stop11h 21mAir Canada

Deal found 4/17

$602

Tue 8/53:16 pmORD - LHR

1 stop10h 34mIberia

Wed 8/202:25 pmLHR - ORD

Nonstop8h 35mIberia

Deal found 4/17

$607

Wed 5/711:45 amORD - LGW

1 stop14h 25mBritish Airways

Wed 5/1412:20 pmLGW - ORD

1 stop31h 15mBritish Airways

Deal found 4/16

$607

Wed 5/76:35 pmORD - LHR

1 stop12h 25mSWISS

Wed 5/148:05 pmLHR - ORD

1 stop25h 50mSWISS

Deal found 4/16

$611

Mon 5/59:15 pmORD - LHR

1 stop10h 10mAer Lingus

Wed 5/77:40 amLHR - ORD

1 stop12h 20mAer Lingus

Deal found 4/17

$618

Sat 5/310:50 amORD - LHR

1 stop13h 40mJetBlue

Thu 5/811:55 amLHR - ORD

1 stop15h 59mJetBlue

Deal found 4/17

$647

Tue 5/136:05 pmORD - LHR

Nonstop8h 15mLufthansa

Wed 5/212:10 pmLHR - ORD

Nonstop9h 05mLufthansa

Deal found 4/17

$648

Tue 8/195:45 pmORD - LHR

Nonstop7h 35mAmerican Airlines

Thu 9/47:40 amLHR - ORD

1 stop14h 05mAmerican Airlines

Deal found 4/17

$649

Mon 4/289:30 pmORD - LHR

1 stop18h 40mFinnair

Fri 5/97:30 amLHR - ORD

1 stop16h 20mFinnair

Deal found 4/17

$660

Last-minute flights from O'Hare Intl to London
Discover last-minute flight deals from O'Hare Intl to London. Data last updated April 17, 2025 and is based on user searches.

Tue 4/229:40 amORD - LHR

2 stops18h 20mMultiple Airlines

Tue 4/298:45 amLHR - ORD

1 stop13h 10mMultiple Airlines

Deal found 4/15

$603

Tue 4/223:35 pmORD - LHR

1 stop12h 25mAir Canada

Tue 4/299:30 amLHR - ORD

1 stop11h 25mAir Canada

Deal found 4/17

$613

Tue 4/223:30 pmORD - LHR

1 stop16h 00mDelta

Wed 4/309:00 amLHR - ORD

1 stop12h 00mDelta

Deal found 4/16

$621

Tue 4/226:30 pmORD - LHR

1 stop12h 00mBritish Airways

Wed 4/302:25 pmLHR - ORD

Nonstop8h 35mBritish Airways

Deal found 4/16

$651

Sat 4/261:26 pmORD - LHR

1 stop14h 04mJetBlue

Thu 5/88:25 amLHR - ORD

1 stop16h 11mJetBlue

Deal found 4/16

$646

Sun 4/276:35 pmORD - LHR

1 stop15h 50mSWISS

Mon 5/56:40 pmLHR - ORD

1 stop23h 30mSWISS

Deal found 4/16

$611

Sun 4/2710:15 pmORD - LGW

1 stop10h 25mMultiple Airlines

Wed 5/710:55 amLGW - ORD

1 stop25h 47mMultiple Airlines

Deal found 4/17

$617

Sun 4/275:43 pmORD - LHR

1 stop11h 27mAir France

Tue 5/69:00 amLHR - ORD

1 stop12h 00mAir France

Deal found 4/15

$620

Sun 4/279:15 pmORD - LHR

1 stop11h 40mAer Lingus

Fri 5/912:00 pmLHR - ORD

1 stop13h 00mAer Lingus

Deal found 4/16

$648

Sun 4/279:20 pmORD - LHR

Nonstop8h 25mUnited Airlines

Tue 5/612:10 pmLHR - ORD

1 stop33h 45mUnited Airlines

Deal found 4/16

$663

Sun 4/271:15 pmORD - LHR

1 stop11h 30mKLM

Thu 5/88:40 amLHR - ORD

1 stop11h 30mKLM

Deal found 4/16

$666

Sun 4/2710:15 pmORD - LGW

1 stop10h 25mIcelandair

Tue 5/61:00 pmLGW - ORD

1 stop11h 15mIcelandair

Deal found 4/16

$670

One-way flights from O'Hare Intl to London
Search for one-way flight options from O'Hare Intl to London. Find affordable one-way fares based on user searches. Data last updated April 17, 2025.

Wed 5/147:47 amORD - LGW

1 stop20h 13mMultiple Airlines

Deal found 4/16

$267

Wed 7/95:10 pmORD - SEN

2 stops21h 40mMultiple Airlines

Deal found 4/17

$269

Wed 7/1610:15 pmORD - LHR

1 stop31h 40mIcelandair

Deal found 4/17

$271

Sun 4/277:25 pmORD - LGW

1 stop13h 15mIcelandair

Deal found 4/16

$274

Mon 7/146:10 pmORD - LHR

1 stop12h 35mTAP AIR PORTUGAL

Deal found 4/16

$277

Tue 5/135:51 amORD - LHR

2 stops32h 29mMultiple Airlines

Deal found 4/16

$283

Mon 4/287:25 pmORD - STN

2 stops14h 40mMultiple Airlines

Deal found 4/15

$285

Wed 7/95:10 pmORD - LTN

2 stops23h 25mMultiple Airlines

Deal found 4/17

$286

Wed 4/2310:20 pmORD - LHR

Nonstop7h 55mIberia

Deal found 4/15

$379

Tue 4/299:30 pmORD - LHR

1 stop18h 40mFinnair

Deal found 4/16

$381

Mon 7/146:10 pmORD - LGW

2 stops20h 15mTAP AIR PORTUGAL

Deal found 4/17

$382

Mon 5/123:45 pmORD - LHR

1 stop11h 20mAer Lingus

Deal found 4/17

$385

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 5/6

7:47 pm-11:45 am

3 stops33h 58m

London Gatwick

Tue 5/13

2:00 pm-8:50 am

2 stops24h 50m

$599

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/6

4:40 pm-10:20 am

1 stop11h 40m

London Heathrow

Thu 5/15

11:10 am-1:55 pm

Nonstop8h 45m

$600

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 9/1

10:15 pm-2:35 pm

1 stop10h 20m

London Gatwick

Wed 9/17

3:40 pm-9:15 pm

1 stop11h 35m

$600

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/22

9:40 am-10:00 am

2 stops18h 20m

London Heathrow

Tue 4/29

8:45 am-3:55 pm

1 stop13h 10m

$603

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/13

6:05 pm-8:20 am

Nonstop8h 15m

London Heathrow

Mon 5/19

1:45 pm-12:10 pm

1 stop28h 25m

$606

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/6

5:40 pm-7:20 am

Nonstop7h 40m

London Heathrow

Tue 5/13

9:15 am-11:45 am

Nonstop8h 30m

$608

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/13

7:05 pm-1:00 pm

1 stop11h 55m

London Heathrow

Tue 5/20

8:45 am-3:55 pm

1 stop13h 10m

$611

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/22

3:35 pm-10:00 am

1 stop12h 25m

London Heathrow

Tue 4/29

9:30 am-2:55 pm

1 stop11h 25m

$613

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 5/6

7:25 pm-10:55 pm

2 stops21h 30m

London Luton

Wed 5/14

11:25 am-1:35 pm

2 stops32h 10m

$613

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/6

3:45 pm-8:00 am

1 stop10h 15m

London Heathrow

Tue 5/13

7:40 am-2:00 pm

1 stop12h 20m

$617

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 60 results

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Compare providers for flights from O'Hare Intl to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to London in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
ScholarTrip	Price Accuracy3 stars	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
oojo	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Gurufare	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago O'Hare Intl Airport-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Chicago O'Hare Intl Airport to London flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to London trip

Airlines

British Airways

BA's Club Suite offers private pods with doors for enhanced privacy on long-haul flights.

BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

Read more about British Airwaysby Gabriel Leigh

Iberia

Iberia's premium economy offers 37-inch legroom and noise-canceling headphones for long-haul flights.

Iberia's Wi-Fi is free for messaging apps for Business class and Iberia Plus members.

Airports

ORD

Prepare for long walks between terminals at ORD. Use the free shuttle train outside security for easier transfers.

LHR

Take the Heathrow Express for the fastest route to central London, reaching Paddington Station quickly.

Our travel experts

Gabriel Leigh

Expert on British Airways

Emily Zemler

Expert on Iberia

Ramsey Qubein

Expert on ORD and LHR

Best time to book a flight from O'Hare Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from O'Hare Intl with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to London

How far ahead should I book a flight from Chicago O'Hare Intl Airport to London?

The best time to book flights from Chicago O'Hare Intl Airport to London is 48 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London?

Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $661). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of $1,110). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to LON?

It’s typically best to fly out from Chicago O'Hare Intl Airport to London in the morning. Doing so could potentially save you 13% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to London?

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to London flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago O'Hare Intl Airport to London

The most flights from ORD to LON are scheduled on a Thursday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (49 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, KLM and Finnair from Chicago to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,916 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,327 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,580 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,667 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London round-trip?
Flying on Icelandair is currently your cheapest option to London, with prices starting at $598. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Air Canada, with the lowest prices starting at $601 and $602, respectively. You may be able to fly from Chicago O'Hare Intl Airport to London for 21% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London one-way?
One-way options have recently been found by users for as low as $271 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $277 and Iberia from $379 one-way.
What are the most popular routes from Chicago O'Hare Intl Airport to London?
Most travelers choose Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City when deciding on the best route from Chicago O'Hare Intl Airport to London.
What are the most reliable airlines from Chicago O'Hare Intl Airport to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to London on time: Royal Jordanian (88%), Gulf Air (82%), Malaysia Airlines (79%).
What are the cheapest flights from Chicago O'Hare Intl Airport to London?
Looking at all options, your cheapest flight can be booked for $408. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $519 on average our data indicates $2,643 when flying from Chicago O'Hare Intl Airport to London.
Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?
Chicago O'Hare Intl Airport to London flights have a layover in Reykjavik most often. Reykjavik is followed by Copenhagen in terms of the most popular layover location on flights from Chicago O'Hare Intl Airport to London.
What are some popular things to do or see while on a layover in Reykjavik?
The majority of Reykjavik visitors spend their time at Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $49 per day to make their sightseeing more efficient.
What are some popular points of interest to see during a layover in Copenhagen?
Copenhagen travelers tend to visit Tivoli, Kongens Nytorv, and Rådhuspladsen more than any other notable places. Tivoli, Kongens Nytorv and Rådhuspladsen are located about 5.3 mi, 5.1 mi, and 5.2 mi, respectively from Kastrup Copenhagen if you are interested in checking them out. Travelers can rent a car at Kastrup Copenhagen for an average daily rate of $35 to make sightseeing during their layover a little easier.
Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?
Chicago O'Hare Intl Airport to London flights have a layover in Dublin least often.
Can I find deals for flights from O'Hare Intl to London that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to London.
Can I find deals for business class flights from O'Hare Intl to London?
Yes. Cheapflights offers flight deals from O'Hare Intl to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London?
Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $661). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of $1,110). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 10 airlines flying from O'Hare Intl to London

Airline	Cheapest	Average	Flexibility	On-time
SWISS	Cheapest$257	Average$695	FlexibilityNo cancel fee	On-time79%
Scandinavian Airlines	Cheapest$381	Average$594	FlexibilityNo cancel fee	On-time77%
Lufthansa	Cheapest$467	Average$918	FlexibilityNo cancel fee	On-time76%
Icelandair	Cheapest$468	Average$627	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$506	Average$774	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$516	Average$679	FlexibilityNo cancel fee	On-time62%
Air Canada	Cheapest$554	Average$731	FlexibilityNo cancel fee	On-time67%
Finnair	Cheapest$559	Average$713	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$578	Average$882	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$578	Average$856	FlexibilityNo cancel fee	On-time77%

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$267+ Cheap flights from O'Hare Intl (ORD) to London (LON)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/14. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in April or February, booked 48 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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Cheapest flights from O'Hare Intl to LondonExplore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

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Best time to book a flight from O'Hare Intl to London

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Everything you need to know about your flight from Chicago O'Hare Intl Airport to London

How far ahead should I book a flight from Chicago O'Hare Intl Airport to London?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to London. Price data was last updated on April 11, 2025.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London?

What is the cheapest time of day to fly from ORD to LON?

Find hourly flight availability from O'Hare Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to London?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to London. Price data was last updated on December 1, 2024.

Weekly flight availability from Chicago O'Hare Intl Airport to London

Explore weekly flight availability from O'Hare Intl to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 17, 2025.

Rainfall in London by month

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Temperature in London by month

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Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, KLM and Finnair from Chicago to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London round-trip?

What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London one-way?

What are the most popular routes from Chicago O'Hare Intl Airport to London?

What are the most reliable airlines from Chicago O'Hare Intl Airport to London?

What are the cheapest flights from Chicago O'Hare Intl Airport to London?

Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?

What are some popular things to do or see while on a layover in Reykjavik?

What are some popular points of interest to see during a layover in Copenhagen?

Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?

Can I find deals for flights from O'Hare Intl to London that include hotel bookings?

How can I find direct flights from O'Hare Intl to London?

Can I find deals for business class flights from O'Hare Intl to London?

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London?

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Top 10 airlines flying from O'Hare Intl to London

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Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.