What are the cheapest airlines flying from London to Chicago round-trip?

Currently priced at $537, Icelandair will fly you from London to Chicago and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and Lufthansa - these airlines can fly you to your destination from $540 and $541, respectively. Icelandair is currently priced 24% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from London to Chicago one-way?

$450 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Icelandair and WestJet, with prices starting from $476 and $481, respectively.

What are the most popular routes from London to Chicago?

While some choose either London Gatwick - Chicago O'Hare Intl or London Heathrow - Chicago Midway, London Heathrow - Chicago O'Hare Intl is the most popular route from London to Chicago.

What are the cheapest flights from London to Chicago?

While on average a flight from London to Chicago is generally $2,299, our data shows the cheapest flight currently is $549. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $457 for that flight.

What are the most reliable airlines from London to Chicago?

Before booking your flight to Chicago from London, check out the most reliable airlines to get you to your destination on time: Air Canada (93%), Austrian Airlines (93%), United Airlines( 93%).

What are the most popular airlines that fly from London to Chicago?

Before booking your flight from London to Chicago check out the most popular airlines for this route: American Airlines, Finnair or British Airways.

What is the cheapest day to fly round-trip from London to Chicago?

Saturday flights are found to be more expensive to fly from London to Chicago. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Chicago.

How far in advance should I book a flight from London to Chicago?

Find a great deal and save up to 17% by booking at least 45 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London to Chicago within the next two weeks, with the cheapest ticket starting at $684.

What is the cheapest month to fly from London to Chicago?

February can be a great time to fly to Chicago from London with a flight ticket averaging about $713. Cheapflights users have found deals in the month of February for as cheap as $428. The most expensive prices can be found in the month of August.

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

Most trusted provider : When it comes to deals on London-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub 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 London-Chicago 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 London to Chicago that include hotel bookings?

Yes. In addition to deals on London to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from London to Chicago?

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

Can I find deals for business class flights from London to Chicago?

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

$419+ Flights from London to Chicago

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Find cheap flights from London to Chicago with Cheapflights

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 London to Chicago are usually found in February or November, booked 44 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from London to Chicago

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$537 (Gotogate)
One-way from	$419 (Kiwi.com)
Popular in	August
Cheapest in	February
Average price	$640
Good round-trip deal	$685 or less
Good one-way deal	$660 or less

Provider with most accurate pricing for London (LON)-Chicago (CHI) flight deals.

Search Deals

Provider most trusted by Cheapflights users for London (LON)-Chicago (CHI) flights.

Search Deals

From London (LON) to Chicago (CHI)

Search Deals

One-way flight from London (LON) to Chicago (CHI)

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($99 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to Chicago (CHI).

Search Deals

Price to beat on a one-way flight from London (LON) to Chicago (CHI).

Search Deals

Find flight deals from London to Chicago

Cheapest flights from London to Chicago
Explore the most affordable flight options available from London to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Fri 6/61:05 pmLHR - ORD

1 stop11h 10mIcelandair

Sun 6/87:25 pmORD - LHR

1 stop18h 55mIcelandair

Deal found 3/24

$537

Thu 5/82:50 pmLGW - ORD

2 stops31h 20mMultiple Airlines

Thu 5/157:15 pmORD - LGW

2 stops20h 10mMultiple Airlines

Deal found 3/24

$538

Sun 5/46:00 amLHR - ORD

1 stop12h 10mMultiple Airlines

Sun 5/116:05 pmORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 3/23

$538

Thu 6/261:00 pmLGW - ORD

1 stop11h 15mIcelandair

Mon 7/147:25 pmORD - LGW

1 stop10h 20mIcelandair

Deal found 3/24

$540

Sat 4/267:40 amLHR - ORD

1 stop12h 20mBritish Airways

Fri 5/98:30 pmORD - LHR

Nonstop8h 00mBritish Airways

Deal found 3/24

$540

Sat 5/36:30 amLHR - ORD

1 stop12h 25mLufthansa

Sat 5/104:05 pmORD - LHR

Nonstop8h 15mLufthansa

Deal found 3/24

$541

Mon 4/2111:05 amLHR - ORD

Nonstop9h 05mAustrian Airlines

Mon 4/286:05 pmORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 3/24

$542

Wed 4/239:05 pmLGW - ORD

1 stop22h 25mBritish Airways

Mon 4/2811:36 amORD - LGW

2 stops16h 39mBritish Airways

Deal found 3/23

$545

Fri 6/61:30 pmLTN - ORD

2 stops32h 40mMultiple Airlines

Sun 6/87:15 pmORD - LTN

2 stops20h 15mMultiple Airlines

Deal found 3/24

$550

Sun 5/46:50 amLHR - ORD

1 stop11h 10mUnited Airlines

Tue 5/133:52 pmORD - LHR

1 stop13h 43mUnited Airlines

Deal found 3/24

$554

Fri 6/61:55 pmSTN - ORD

2 stops32h 15mMultiple Airlines

Sun 6/87:15 pmORD - STN

2 stops20h 00mMultiple Airlines

Deal found 3/24

$557

Sat 5/33:05 pmLGW - ORD

2 stops21h 59mFinnair

Sat 5/108:17 pmORD - LGW

2 stops29h 33mFinnair

Deal found 3/24

$558

Best flights from London to Chicago
Discover carefully curated flight deals from London to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2025.

Fri 6/61:05 pmLHR - ORD

1 stop11h 10mIcelandair

Sun 6/87:25 pmORD - LHR

1 stop18h 55mIcelandair

Deal found 3/24

$537

Thu 5/82:50 pmLGW - ORD

2 stops31h 20mMultiple Airlines

Thu 5/157:15 pmORD - LGW

2 stops20h 10mMultiple Airlines

Deal found 3/24

$538

Sat 4/267:40 amLHR - ORD

1 stop12h 20mBritish Airways

Fri 5/98:30 pmORD - LHR

Nonstop8h 00mBritish Airways

Deal found 3/24

$540

Sat 5/36:30 amLHR - ORD

1 stop12h 25mLufthansa

Sat 5/104:05 pmORD - LHR

Nonstop8h 15mLufthansa

Deal found 3/24

$541

Mon 4/2111:05 amLHR - ORD

Nonstop9h 05mAustrian Airlines

Mon 4/286:05 pmORD - LHR

Nonstop8h 15mAustrian Airlines

Deal found 3/24

$542

Sun 5/46:50 amLHR - ORD

1 stop11h 10mUnited Airlines

Mon 5/125:55 pmORD - LHR

1 stop10h 45mUnited Airlines

Deal found 3/24

$554

Wed 4/236:50 amLHR - ORD

2 stops14h 05mAir Canada

Tue 4/292:05 pmORD - LHR

1 stop15h 45mAir Canada

Deal found 3/24

$556

Sat 5/33:05 pmLGW - ORD

2 stops21h 59mFinnair

Sat 5/108:17 pmORD - LGW

2 stops29h 33mFinnair

Deal found 3/24

$558

Tue 4/227:20 pmLCY - ORD

1 stop23h 25mSWISS

Tue 4/292:20 pmORD - LCY

1 stop21h 10mSWISS

Deal found 3/24

$561

Mon 5/59:30 amLHR - ORD

1 stop14h 20mAmerican Airlines

Sun 5/118:30 pmORD - LHR

Nonstop8h 00mAmerican Airlines

Deal found 3/24

$565

Wed 4/2311:45 amLHR - MDW

1 stop12h 35mVirgin Atlantic

Wed 4/307:00 pmMDW - LHR

1 stop12h 10mVirgin Atlantic

Deal found 3/24

$567

Tue 4/223:15 pmLHR - MDW

1 stop13h 07mKLM

Wed 4/3012:48 pmMDW - LHR

1 stop11h 57mKLM

Deal found 3/24

$572

Last-minute flights from London to Chicago
Discover last-minute flight deals from London to Chicago. Data last updated March 25, 2025 and is based on user searches.

Mon 3/318:05 pmLHR - ORD

1 stop22h 40mMultiple Airlines

Mon 4/74:05 pmORD - LHR

Nonstop8h 15mMultiple Airlines

Deal found 3/24

$596

Mon 3/314:10 pmSTN - ORD

2 stops30h 00mMultiple Airlines

Mon 4/78:05 pmORD - STN

2 stops20h 05mMultiple Airlines

Deal found 3/24

$641

Mon 3/318:40 amLHR - ORD

2 stops15h 41mDelta

Mon 4/72:10 pmORD - LHR

1 stop14h 20mDelta

Deal found 3/24

$646

Mon 3/313:50 pmLGW - ORD

2 stops45h 44mMultiple Airlines

Wed 4/212:14 pmORD - LGW

1 stop15h 46mMultiple Airlines

Deal found 3/24

$659

Mon 3/316:00 pmLHR - ORD

2 stops21h 46mLufthansa

Mon 4/78:50 amORD - LHR

2 stops16h 05mLufthansa

Deal found 3/24

$684

Thu 4/36:00 amLHR - ORD

1 stop13h 20mAustrian Airlines

Mon 4/2811:15 amORD - LHR

1 stop13h 40mAustrian Airlines

Deal found 3/24

$597

Thu 4/38:40 amLHR - ORD

1 stop11h 30mVirgin Atlantic

Tue 4/85:08 pmORD - LHR

1 stop9h 47mVirgin Atlantic

Deal found 3/24

$605

Thu 4/38:40 amLHR - ORD

1 stop13h 15mUnited Airlines

Tue 4/89:20 pmORD - LHR

Nonstop8h 25mUnited Airlines

Deal found 3/24

$611

Thu 4/39:15 amLHR - ORD

Nonstop8h 35mBritish Airways

Mon 4/2810:20 pmORD - LHR

Nonstop7h 55mBritish Airways

Deal found 3/24

$622

Thu 4/38:40 amLHR - ORD

1 stop13h 15mSWISS

Tue 4/83:45 pmORD - LHR

2 stops34h 30mSWISS

Deal found 3/24

$650

Thu 4/37:45 amLCY - ORD

1 stop12h 25mVirgin Atlantic

Mon 4/284:20 pmORD - LCY

1 stop10h 30mVirgin Atlantic

Deal found 3/24

$660

Thu 4/311:45 amLHR - MDW

1 stop12h 17mVirgin Atlantic

Mon 4/287:00 pmMDW - LHR

1 stop12h 10mVirgin Atlantic

Deal found 3/24

$689

One-way flights from London to Chicago
Search for one-way flight options from London to Chicago. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Thu 5/810:00 amLGW - MDW

2 stops31h 09mMultiple Airlines

Deal found 3/23

$419

Thu 5/89:20 pmSTN - ORD

2 stops24h 50mMultiple Airlines

Deal found 3/23

$420

Wed 4/27:15 amLGW - ORD

3 stops30h 19mMultiple Airlines

Deal found 3/24

$422

Thu 4/37:00 amLTN - ORD

3 stops30h 34mMultiple Airlines

Deal found 3/24

$422

Wed 5/79:25 pmLHR - MDW

2 stops43h 44mMultiple Airlines

Deal found 3/23

$423

Thu 6/197:20 amLHR - ORD

2 stops39h 24mMultiple Airlines

Deal found 3/23

$426

Tue 5/66:45 pmLHR - ORD

1 stop27h 25mTAP AIR PORTUGAL

Deal found 3/24

$450

Thu 5/81:05 pmLHR - ORD

1 stop11h 10mIcelandair

Deal found 3/23

$476

Sat 6/212:10 pmLHR - ORD

2 stops28h 29mWestJet

Deal found 3/23

$481

Thu 4/175:40 pmSEN - ORD

2 stops42h 05mMultiple Airlines

Deal found 3/24

$485

Fri 4/1112:40 pmLGW - MDW

1 stop29h 20mAir Transat

Deal found 3/24

$524

Sun 4/2010:00 pmLHR - ORD

1 stop22h 00mAer Lingus

Deal found 3/24

$526

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 6/6

1:05 pm-6:15 pm

1 stop11h 10m

Chicago O'Hare Intl

Sun 6/8

7:25 pm-8:20 pm

1 stop18h 55m

$537

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 5/8

2:50 pm-4:10 pm

2 stops31h 20m

Chicago O'Hare Intl

Thu 5/15

7:15 pm-9:25 pm

2 stops20h 10m

$538

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 5/4

6:00 am-12:10 pm

1 stop12h 10m

Chicago O'Hare Intl

Sun 5/11

6:05 pm-8:20 am

Nonstop8h 15m

$538

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 4/20

6:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Sun 4/27

11:15 am-10:40 am

1 stop17h 25m

$539

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 4/26

7:40 am-2:00 pm

1 stop12h 20m

Chicago O'Hare Intl

Fri 5/9

8:30 pm-10:30 am

Nonstop8h 00m

$540

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 6/26

1:00 pm-6:15 pm

1 stop11h 15m

Chicago O'Hare Intl

Mon 7/14

7:25 pm-11:45 am

1 stop10h 20m

$540

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 5/3

6:30 am-12:55 pm

1 stop12h 25m

Chicago O'Hare Intl

Sat 5/10

4:05 pm-6:20 am

Nonstop8h 15m

$541

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 4/23

9:05 pm-1:30 pm

1 stop22h 25m

Chicago O'Hare Intl

Mon 4/28

11:36 am-10:15 am

2 stops16h 39m

$545

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 6/6

1:30 pm-4:10 pm

2 stops32h 40m

Chicago O'Hare Intl

Sun 6/8

7:15 pm-9:30 pm

2 stops20h 15m

$550

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 5/4

6:50 am-12:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Mon 5/12

5:55 pm-10:40 am

1 stop10h 45m

$554

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 60 results

...

Compare providers for flights from London to Chicago

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Chicago in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
Cheapflightsfares	Price Accuracy1 star	Trust Score*2 stars
oojo	Price Accuracy3 stars	Trust Score*2 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*2 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 London-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Chicago flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub 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 London-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from London to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from London 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 London to Chicago

How far ahead should I book a flight from London to Chicago?

The best time to book flights from London to Chicago is 44 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 London to Chicago?

Currently, August is the cheapest month in which you can book a flight from London to Chicago (average of $245). Flying from London to Chicago in March is currently the most expensive (average of $323). 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 LON to CHI?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 32% on flights from London to Chicago by exploring options for tickets in the evening.

What is the cheapest day to fly from London to Chicago?

Travelers seeking maximum savings on their London to Chicago flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Chicago

The most flights from LON to CHI are scheduled on a Saturday (39 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (37 on average).

Rainfall in Chicago by month

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

If weather is an important factor for your trip to Chicago, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Read reviews from past customers who have flown Delta, KLM and Air Transat from London to Chicago. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,890 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,318 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat

7.8

Good

381 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT

7.6

Good

1,061 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,266 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines flying from London to Chicago round-trip?
Currently priced at $537, Icelandair will fly you from London to Chicago and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and Lufthansa - these airlines can fly you to your destination from $540 and $541, respectively. Icelandair is currently priced 24% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London to Chicago one-way?
$450 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Icelandair and WestJet, with prices starting from $476 and $481, respectively.
What are the most popular routes from London to Chicago?
While some choose either London Gatwick - Chicago O'Hare Intl or London Heathrow - Chicago Midway, London Heathrow - Chicago O'Hare Intl is the most popular route from London to Chicago.
What are the most reliable airlines from London to Chicago?
Before booking your flight to Chicago from London, check out the most reliable airlines to get you to your destination on time: Air Canada (93%), Austrian Airlines (93%), United Airlines( 93%).
What are the cheapest flights from London to Chicago?
While on average a flight from London to Chicago is generally $2,299, our data shows the cheapest flight currently is $549. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $457 for that flight.
Can I find deals for flights from London to Chicago that include hotel bookings?
Yes. In addition to deals on London to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Chicago.
Can I find deals for business class flights from London to Chicago?
Yes. Cheapflights offers flight deals from London to Chicago 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 London to Chicago?
Currently, August is the cheapest month in which you can book a flight from London to Chicago (average of $245). Flying from London to Chicago in March is currently the most expensive (average of $323). 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.

See more FAQs

Merrillville

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Hammond

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Porter

Lansing

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Chesterton

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Complete your trip

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Top 10 airlines flying from London to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$451	Average$587	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$483	Average$729	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$492	Average$675	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$562	Average$788	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$562	Average$848	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$573	Average$804	FlexibilityNo cancel fee	On-time70%
Aer Lingus	Cheapest$574	Average$739	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$582	Average$777	FlexibilityNo cancel fee	On-time77%
Finnair	Cheapest$613	Average$838	FlexibilityNo cancel fee	On-time76%
Lufthansa	Cheapest$660	Average$1,067	FlexibilityNo cancel fee	On-time76%

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$419+ Cheap flights from London (LON) to Chicago (CHI)

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 5/8. 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 London to Chicago are usually found in February or November, booked 44 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from London to Chicago

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Find flight deals from London to Chicago

Cheapest flights from London to ChicagoExplore the most affordable flight options available from London to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Explore the most affordable flight options available from London to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

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Use the filters below to find and compare flights from London to Chicago that are best for you.

Compare providers for flights from London to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Chicago in March.

Best time to book a flight from London to Chicago

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

Cheapflights Insights

Everything you need to know about your flight from London to Chicago

How far ahead should I book a flight from London to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from London to Chicago. Price data was last updated on March 21, 2025.

What is the cheapest month to book a flight from London to Chicago?

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

Find hourly flight availability from London to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

What is the cheapest day to fly from London to Chicago?

Use this chart to determine the cheapest time to fly round-trip from London to Chicago. Price data was last updated on December 16, 2024.

Weekly flight availability from London to Chicago

Explore weekly flight availability from London to Chicago. 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 March 25, 2025.

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

Reviews of airlines servicing Chicago

Read reviews from past customers who have flown Delta, KLM and Air Transat from London to Chicago. In addition to providing an overall rating, users have also rated airlines 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 London to Chicago. 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 London to Chicago round-trip?

What are the cheapest airlines to fly from London to Chicago one-way?

What are the most popular routes from London to Chicago?

What are the most reliable airlines from London to Chicago?

What are the cheapest flights from London to Chicago?

Can I find deals for flights from London to Chicago that include hotel bookings?

How can I find direct flights from London to Chicago?

Can I find deals for business class flights from London to Chicago?

What is the cheapest month to book a flight from London to Chicago?

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Alternative routes for London to Chicago

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Top 10 airlines flying from London to Chicago

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Cheapest flights from London to Chicago
Explore the most affordable flight options available from London to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.