O'Hare Intl

$536+ Cheap flights from Heathrow (LHR) to O'Hare Intl (ORD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
Oct 11 — Oct 181
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Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in February or September, booked 85 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Heathrow to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to O'Hare Intl (ORD). 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 September 11, 2025.

Round-trip from

$537
(Justfly.com)

Popular in

July

Cheapest in

February

Average price

$648

Good round-trip deal

$756 or less

Good one-way deal

$651 or less
From London Heathrow to Chicago O'Hare Intl
Highest demand for flights based on searches. 13% potential increase in price ($113 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from London Heathrow to Chicago O'Hare Intl.
Price to beat on a one-way flight from London Heathrow to Chicago O'Hare Intl.

Find flight deals from Heathrow to O'Hare Intl

Cheapest flights from Heathrow to O'Hare Intl
Explore the most affordable flight options available from Heathrow to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:50 amLHR - ORD
1 stop11h 15mMultiple Airlines
Mon 9/227:05 pmORD - LHR
1 stop15h 20mMultiple Airlines
Deal found 9/10$536
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:50 amLHR - ORD
1 stop11h 15mMultiple Airlines
Mon 9/299:25 pmORD - LHR
Nonstop8h 20mMultiple Airlines
Deal found 9/11$537
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/207:45 amLHR - ORD
2 stops15h 20mUnited Airlines
Wed 9/249:50 pmORD - LHR
Nonstop7h 55mUnited Airlines
Deal found 9/11$538
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/207:45 amLHR - ORD
2 stops15h 20mUnited Airlines
Sat 9/274:05 pmORD - LHR
1 stop11h 15mUnited Airlines
Deal found 9/10$539
This Austrian Airlines deal was found by Cheapflights users on 9/10. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:00 amLHR - ORD
1 stop13h 20mAustrian Airlines
Fri 10/104:20 pmORD - LHR
1 stop34h 25mAustrian Airlines
Deal found 9/10$540
This Expedia deal was found by Cheapflights users on 9/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/192:10 pmLHR - ORD
Nonstop8h 35mMultiple Airlines
Mon 9/229:50 pmORD - LHR
Nonstop7h 55mMultiple Airlines
Deal found 9/11$541
This Icelandair deal was found by Cheapflights users on 9/11. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:35 pmLHR - ORD
1 stop26h 45mIcelandair
Mon 1/126:30 pmORD - LHR
1 stop10h 20mIcelandair
Deal found 9/11$542
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/88:30 amLHR - ORD
1 stop12h 25mLufthansa
Wed 10/1510:30 pmORD - LHR
1 stop13h 10mLufthansa
Deal found 9/10$543
This Scandinavian Airlines deal was found by Cheapflights users on 9/11. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:40 amLHR - ORD
1 stop17h 05mScandinavian Airlines
Sun 11/27:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 9/11$544
This Air Canada deal was found by Cheapflights users on 9/11. 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 10/76:50 amLHR - ORD
2 stops14h 14mAir Canada
Thu 10/163:50 pmORD - LHR
1 stop12h 10mAir Canada
Deal found 9/11$546
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:50 amLHR - ORD
1 stop11h 15mMultiple Airlines
Mon 10/134:20 pmORD - LHR
1 stop16h 00mMultiple Airlines
Deal found 9/10$547

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to O'Hare Intl 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 September 11, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago O'Hare Intl Airport that are best for you.

Fly from

Heathrow

Fly to

O'Hare Intl

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/7

6:50 am-3:04 pm

2 stops14h 14m

Chicago O'Hare Intl

Tue 10/14

10:40 am-6:30 am

1 stop13h 50m

$539

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 10/13

5:01 am-9:40 am

1 stop22h 39m

$539

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

9:15 am-4:05 pm

1 stop12h 50m

Chicago O'Hare Intl

Wed 10/15

8:40 pm-10:30 am

Nonstop7h 50m

$548

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/30

7:05 am-6:45 pm

2 stops16h 40m

Chicago O'Hare Intl

Sun 11/2

7:20 pm-6:50 pm

2 stops17h 30m

$549

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

9:40 am-6:10 pm

1 stop14h 30m

Chicago O'Hare Intl

Wed 10/15

7:05 am-6:45 am

1 stop17h 40m

$549

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

9:15 am-5:36 pm

1 stop14h 21m

Chicago O'Hare Intl

Tue 10/14

3:10 pm-7:50 am

1 stop10h 40m

$550

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/7

8:30 am-11:30 am

Nonstop9h 00m

Chicago O'Hare Intl

Tue 10/14

12:55 pm-10:40 am

1 stop15h 45m

$561

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 12/8

1:35 pm-5:00 pm

Nonstop9h 25m

Chicago O'Hare Intl

Fri 1/16

3:45 pm-5:55 am

Nonstop8h 10m

$561

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/1

2:10 pm-5:20 pm

Nonstop9h 10m

Chicago O'Hare Intl

Fri 10/10

6:01 pm-11:25 am

1 stop11h 24m

$561

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/4

1:35 pm-5:00 pm

Nonstop9h 25m

Chicago O'Hare Intl

Sun 1/18

5:50 pm-7:55 am

Nonstop8h 05m

$561

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 24 results
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The best insider tips for London Heathrow Airport to Chicago O'Hare Intl 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 London Heathrow Airport to Chicago O'Hare Intl 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 seat width and legroom, enhancing comfort.

United Airlines

United's Polaris Class offers lie-flat seats and Saks Fifth Avenue bedding for ultimate comfort.


United's Premium Plus includes two checked bags and priority check-in, enhancing convenience.

Iberia

Iberia's premium economy offers 37-inch legroom and noise-canceling headphones for better rest.


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

Read more about Iberiaby Emily Zemler
Airports
LHR

Expect strict security at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

Read more about LHRby Ramsey Qubein
ORD

Upon arrival at ORD, expect long walks to immigration in Terminal 5. Plan extra time for customs.

Read more about ORDby 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
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

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 Heathrow to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Heathrow 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 Heathrow Airport to Chicago O'Hare Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to O'Hare Intl. Price data was last updated on August 29, 2025.

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 85 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 Heathrow Airport to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of $245). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 LHR to ORD?

Find hourly flight availability from Heathrow to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago O'Hare Intl Airport in the evening. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the afternoon.

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

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Chicago O'Hare Intl Airport, such as United Airlines, American Airlines, and Aer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Heathrow to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

    Airlines like Air Canada, United Airlines, and British Airways fly from London Heathrow Airport to Chicago O'Hare Intl Airport in about 12h 50m. The time it takes to get you to your destination can typically vary by up to 1h 24m. The distance between London Heathrow Airport and Chicago O'Hare Intl Airport is about 3939 mi. This flight may include one or multiple stops.

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

    According to our current data, Icelandair ($451), Aer Lingus ($453), and Scandinavian Airlines ($462) offers the cheapest pricing from London Heathrow Airport to Chicago O'Hare Intl Airport. These flights start at 38% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $554. Lufthansa flights start at $554 while deals on Austrian Airlines start at $554 one-way.

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

    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 London Heathrow Airport to Chicago O'Hare Intl Airport on time: Air Canada (75%), Austrian Airlines (75%), United Airlines (75%).

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

    The cheapest flight price from London Heathrow Airport to Chicago O'Hare Intl Airport is $593. On average you can expect to pay $1,476. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $435.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of $245). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Skokie
Gurnee
Hoffman Estates
Des Plaines
Elgin
Arlington Heights
Beloit
Racine
Rockford
Orland Park
Oak Brook
Downers Grove
Naperville
Elk Grove Village
Evanston
Merrillville
Bridgeview
Warrenville

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Heathrow to O'Hare Intl

Discover the top 10 airlines that operate flights from Heathrow to O'Hare Intl. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$565FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$453Average$683FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$462Average$537FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$485Average$746FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$553Average$769FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$793FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$582Average$809FlexibilityNo cancel feeOn-time71%
Austrian AirlinesCheapest$586Average$967FlexibilityNo cancel feeOn-time78%
FinnairCheapest$607Average$809FlexibilityNo cancel feeOn-time76%

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