HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$334+ Cheap flights from O'Hare Intl (ORD) to Heathrow (LHR)

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
Jul 23 — Jul 301
Wed 7/23
Wed 7/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from O'Hare Intl to Heathrow 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 Chicago O'Hare Intl to London Heathrow are usually found in February or April, booked 55 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from O'Hare Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 18, 2025.

Round-trip from

$583
(United Airlines)

One-way from

$334
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$980

Good round-trip deal

$670 or less

Good one-way deal

$388 or less
From Chicago O'Hare Intl to London Heathrow
Search Deals
One-way flight from Chicago O'Hare Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
Search Deals

Find flight deals from O'Hare Intl to Heathrow

Cheapest flights from O'Hare Intl to Heathrow
Explore the most affordable flight options available from O'Hare Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.

This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/23:35 pmORD - LHR
1 stop12h 25mUnited Airlines
Tue 8/1212:15 pmLHR - ORD
1 stop12h 25mUnited Airlines
Deal found 7/17$583
This oojo deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Sun 11/306:40 pmLHR - ORD
1 stop28h 05mScandinavian Airlines
Deal found 7/17$587
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/197:59 pmORD - LHR
1 stop11h 11mDelta
Mon 10/278:00 pmLHR - ORD
2 stops21h 08mDelta
Deal found 7/17$592
This Finnair deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/225:40 pmORD - LHR
Nonstop7h 40mFinnair
Mon 8/2510:20 amLHR - ORD
1 stop13h 30mFinnair
Deal found 7/16$596
This American Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/225:15 pmORD - LHR
1 stop10h 50mAmerican Airlines
Sun 9/78:10 amLHR - ORD
1 stop13h 35mAmerican Airlines
Deal found 7/16$597
This KLM deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/94:15 pmORD - LHR
1 stop12h 30mKLM
Thu 8/218:40 amLHR - ORD
1 stop11h 30mKLM
Deal found 7/16$599
This Cheapflightsfares deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:35 pmORD - LHR
Nonstop7h 40mBritish Airways
Sun 10/512:15 pmLHR - ORD
Nonstop8h 35mBritish Airways
Deal found 7/17$600
This Iberia deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:59 pmORD - LHR
1 stop25h 41mIberia
Wed 10/159:45 amLHR - ORD
1 stop12h 28mIberia
Deal found 7/17$602
This Virgin Atlantic deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/222:10 pmORD - LHR
1 stop10h 35mVirgin Atlantic
Sun 8/316:30 amLHR - ORD
2 stops14h 30mVirgin Atlantic
Deal found 7/16$631
This Air Canada deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/22:08 pmORD - LHR
1 stop10h 22mAir Canada
Wed 9/176:50 amLHR - ORD
2 stops14h 05mAir Canada
Deal found 7/15$633

Cheapflights Fare Finder

Customize your flight search to find flights from O'Hare Intl to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 18, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport that are best for you.

Fly from

O'Hare Intl

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 8/2

3:35 pm-10:00 am

1 stop12h 25m

London Heathrow

Tue 8/12

12:15 pm-6:40 pm

1 stop12h 25m

$583

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 8/7

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Sun 8/17

9:25 pm-9:15 pm

1 stop29h 50m

$594

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 8/22

5:40 pm-7:20 am

Nonstop7h 40m

London Heathrow

Mon 8/25

10:20 am-5:50 pm

1 stop13h 30m

$596

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 8/22

5:15 pm-10:05 am

1 stop10h 50m

London Heathrow

Sun 9/7

8:10 am-3:45 pm

1 stop13h 35m

$597

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 10/2

7:15 pm-2:35 pm

2 stops37h 20m

London Heathrow

Thu 10/16

10:20 am-4:10 pm

1 stop11h 50m

$598

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 8/9

4:15 pm-10:45 am

1 stop12h 30m

London Heathrow

Thu 8/21

8:40 am-2:10 pm

1 stop11h 30m

$599

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 9/26

10:35 pm-12:15 pm

Nonstop7h 40m

London Heathrow

Sun 10/5

12:15 pm-2:50 pm

Nonstop8h 35m

$600

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 10/4

1:59 pm-9:40 pm

1 stop25h 41m

London Heathrow

Thu 10/16

12:30 pm-10:39 pm

1 stop16h 09m

$602

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 9/26

10:40 am-9:15 am

1 stop16h 35m

London Heathrow

Sun 10/12

6:15 am-3:00 pm

1 stop14h 45m

$621

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/3

9:00 am-6:45 am

1 stop15h 45m

London Heathrow

Tue 8/12

10:55 am-8:23 pm

2 stops15h 28m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/14

Showing 1-10 of 21 results
1
2
3

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to London Heathrow Airport trip
Airlines
British Airways

BA's Club Suite offers private pods with doors, ideal for long-haul comfort.


BA's World Traveller Plus offers extra legroom and upgraded service, ideal for long-haul flights.

Read more about British Airwaysby Gabriel Leigh
Iberia

Iberia's premium economy offers 37-inch legroom and priority boarding, enhancing long-haul comfort.


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

Read more about Iberiaby Emily Zemler
Airports
ORD

For a quick snack before departure, grab some Garrett Popcorn, a Chicago favorite, near gate B8 in Terminal 1.

Read more about ORDby Ramsey Qubein
LHR

Take the Heathrow Express for the fastest route to central London, arriving at Paddington Station for easy connections.

Read more about LHRby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Emily Zemler

Emily Zemler

Expert on Iberia

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD and LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

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

The price you pay for your flight from Chicago O'Hare Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 55 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of $661). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,095). 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 LHR?

Find hourly flight availability from O'Hare Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Chicago O'Hare Intl Airport to London Heathrow Airport in the morning. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Heathrow. Price data was last updated on July 13, 2025.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to London Heathrow Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday afternoons 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 Heathrow Airport

Explore weekly flight availability from O'Hare Intl to Heathrow. 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 July 18, 2025.

The most flights from ORD to LHR are scheduled on a Monday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (52 on average).

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated July 18, 2025.
Read reviews from past customers who have flown Delta, Finnair, and SWISS from Chicago O'Hare Intl Airport to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,959 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,959 reviews
Delta
8.0
Very good
7,959 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,959 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,661 reviews
Delta
8.0
Very good
7,959 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,864 reviews
Delta
8.0
Very good
7,959 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,959 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Heathrow. 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 Heathrow Airport round-trip?

    United Airlines, at $583, was found to be the cheapest airline from Chicago O'Hare Intl Airport to London Heathrow Airport.Alternate airlines to your destination round-trip include British Airways and American Airlines. Users have found that United Airlines is 26% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at $338. Finnair flights start at $365 while deals on Scandinavian Airlines start at $366 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Chicago O'Hare Intl Airport to London Heathrow Airport consider choosing Air Canada (66%), Austrian Airlines (66%) or United Airlines (66%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from Chicago O'Hare Intl Airport to London Heathrow Airport is $215. On average you can expect to pay $2,761. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for $427.

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

    Chicago O'Hare Intl Airport to London Heathrow Airport flights have a layover in Reykjavik most of the time.

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

    Hallgrímskirkja, Laugardalslaug Geothermal Pool, and Harpa are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Hallgrímskirkja, Laugardalslaug Geothermal Pool, and Harpa can be accessed by traveling approximately 23.2 mi, 24.6 mi, and 23.3 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $80 per day.

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

    Flights departing from Chicago O'Hare Intl Airport and landing in London Heathrow Airport layover in Dublin least frequently.

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

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

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

    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 Heathrow.

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

    Yes. Cheapflights offers flight deals from O'Hare Intl to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of $661). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,095). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Borehamwood
Broadway
Aylesbury
Chelmsford
Folkestone
Chichester
Southend-on-Sea
Swindon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from O'Hare Intl to Heathrow

Discover the top 10 airlines that operate flights from O'Hare Intl to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$257Average$671FlexibilityNo cancel feeOn-time79%
DeltaCheapest$345Average$760FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$358Average$597FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$430Average$912FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$468Average$592FlexibilityNo cancel feeOn-time76%
JetBlueCheapest$505Average$869FlexibilityNo cancel feeOn-time62%
TAP AIR PORTUGALCheapest$508Average$804FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$541Average$807FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$569Average$757FlexibilityNo cancel feeOn-time76%
IberiaCheapest$581Average$741FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.