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$527+ Cheap flights from Heathrow (LHR) 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find cheap flights from Heathrow to Chicago with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or September, booked 56 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Find flight deals from Heathrow to Chicago

Cheapest flights from Heathrow to Chicago
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Gotogate deal was found by Cheapflights users on 10/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Fri 2/67:20 pmORD - LHR
1 stop32h 00mScandinavian Airlines
Deal found 10/28$532
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Thu 11/136:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Sun 11/237:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 10/29$533
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Wed 11/1910:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Wed 11/267:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/30$534
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:05 pmLHR - ORD
2 stops25h 40mScandinavian Airlines
Sun 11/167:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/28$536
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Thu 11/139:05 pmLHR - ORD
2 stops25h 40mScandinavian Airlines
Sun 11/167:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 10/30$537
This The Travel House deal was found by Cheapflights users on 10/29. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1610:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Sun 11/237:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/29$538
This Scandinavian Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/217:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Mon 12/17:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/30$539
This oojo deal was found by Cheapflights users on 10/29. 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.
Tue 11/187:30 pmLHR - ORD
1 stop27h 15mScandinavian Airlines
Wed 11/267:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 10/29$540
This Scandinavian Airlines deal was found by Cheapflights users on 10/29. 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 11/137:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Mon 11/177:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 10/29$542
This Scandinavian Airlines deal was found by Cheapflights users on 10/30. 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 12/49:05 pmLHR - ORD
2 stops25h 40mScandinavian Airlines
Mon 12/87:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/30$543
This TravelUp deal was found by Cheapflights users on 10/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/11:00 pmLHR - MDW
1 stop25h 54mDelta
Thu 12/111:14 pmMDW - LHR
1 stop13h 31mDelta
Deal found 10/30$684
This TravelUp deal was found by Cheapflights users on 10/29. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:55 amLHR - MDW
1 stop13h 39mKLM
Mon 12/81:50 pmMDW - LHR
1 stop11h 15mKLM
Deal found 10/29$685

Cheap flight deals from Heathrow to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chicago (CHI). 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$532
(Gotogate)

One-way from

$527
(Cheapflightsfares)

Popular in

July

Cheapest in

February

Average price

$764

Good round-trip deal

$717 or less

Good one-way deal

$594 or less
Provider with most accurate pricing for London Heathrow-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Chicago (CHI) flights.
Search Deals
From London Heathrow to Chicago (CHI)
Search Deals
One-way flight from London Heathrow to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from London Heathrow to Chicago (CHI).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Chicago 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 October 30, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.

Fly from

Heathrow

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 1/21

7:50 pm-4:45 pm

2 stops26h 55m

Chicago O'Hare Intl

Sat 1/24

7:20 pm-6:50 pm

2 stops17h 30m

$542

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/20

6:40 am-5:45 pm

2 stops16h 05m

Chicago O'Hare Intl

Sun 3/22

8:20 pm-6:50 pm

2 stops17h 30m

$565

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 11/25

7:50 pm-4:45 pm

2 stops26h 55m

Chicago O'Hare Intl

Wed 12/3

7:20 pm-4:25 pm

2 stops15h 05m

$582

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 12/8

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Tue 1/6

6:30 pm-7:30 pm

1 stop19h 00m

$598

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/27

10:20 am-4:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Thu 12/4

7:20 pm-4:25 pm

2 stops15h 05m

$598

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/19

10:20 am-4:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Tue 2/3

7:05 am-9:20 am

2 stops20h 15m

$622

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/3

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Mon 1/5

6:30 pm-10:50 am

1 stop10h 20m

$641

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 11/25

9:00 am-4:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Tue 12/2

5:50 pm-7:55 am

Nonstop8h 05m

$646

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/25

7:05 am-5:45 pm

2 stops15h 40m

Chicago O'Hare Intl

Wed 6/10

7:15 pm-6:50 pm

2 stops17h 35m

$662

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/4

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Fri 1/9

6:30 pm-10:50 am

1 stop10h 20m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 39 results
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Compare providers for flights from Heathrow 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 Heathrow to Chicago in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust 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 Heathrow Airport-Chicago flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-Chicago flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Chicago flights, Cheapflights users trust eDreams the most. eDreams 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 Heathrow Airport-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 Heathrow to Chicago

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

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

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Chicago. Price data was last updated on October 24, 2025.

The price you pay for your flight from London Heathrow Airport to Chicago may vary depending on when you book. For the best chance of a lower fare, look to book 45 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 London Heathrow Airport to Chicago?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of $478). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of $673). 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 CHI?

Find hourly flight availability from Heathrow 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 October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago in the evening. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the afternoon.

What’s the top layover airport for flights from London Heathrow Airport to Chicago?

Share of 1-stop round-trip flights from London Heathrow Airport to Chicago chosen by Cheapflights users in the past 12 months, using the same layover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 67% of 1-stop itineraries from London Heathrow Airport to Chicago on Cheapflights.

What’s the cheapest layover airport for flights from London Heathrow Airport to Chicago?

Average round-trip fare for 1-stop flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $544.

What’s the fastest layover option from London Heathrow Airport to Chicago?

Shortest average travel time for 1-stop one-way flights from London Heathrow Airport to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 11h 10m.

Which airport typically offers the quickest layover for flights from London Heathrow Airport to Chicago?

Average layover duration for 1-stop one-way flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 05m.

The best insider tips for London Heathrow Airport to Chicago 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 trip
Airlines
Iberia

Iberia's premium economy offers 37 inches of legroom and noise-canceling headphones for long-haul comfort.


Iberia provides two hot meal options on long-haul flights, with special meals available upon request.

Read more about Iberiaby Emily Zemler
British Airways

BA's Club Suite offers private pods with doors on A350s, ensuring a more private experience.


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

Read more about British Airwaysby Gabriel Leigh
United Airlines

United's Polaris Business Class includes lie-flat seats, Saks Fifth Avenue bedding, and priority check-in.


United's Premium Plus offers extra legroom, upgraded meals, and two checked bags on international flights.

Read more about United Airlinesby Harriet Baskas
Airports
LHR

Heathrow's strict security means long waits. Ensure all liquids are in one small bag to avoid delays during manual screenings.

Read more about LHRby Ramsey Qubein
ORD

At ORD, immigration lines can be long. Be prepared for lengthy walks to reach customs after international flights.

Read more about ORDby Ramsey Qubein
Our travel experts
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
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
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

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated October 30, 2025.
Get a feel of what it's like to fly with United Airlines, American Airlines, and Aer Lingus from London Heathrow Airport to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
American Airlines
7.2
Good
11,034 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Aer Lingus
7.2
Good
1,365 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Lufthansa
6.8
Okay
7,542 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
British Airways
6.7
Okay
7,488 reviews
United Airlines
7.4
Good
8,999 reviews

Food

6.6

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Chicago. 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?

    Scandinavian Airlines, Icelandair, and KLM can get you from London Heathrow Airport to Chicago in just under 11h 05m. Your travel time can differ by up to 15h 50m. The distance from London Heathrow Airport to Chicago is about 3939 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $446, Aer Lingus will fly you from London Heathrow Airport to Chicago and back. In addition to Aer Lingus, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and United Airlines - these airlines can fly you to your destination from $451 and $485, respectively. Aer Lingus is currently priced 37% below the average price you’ll pay for this route.

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

    For one-way options, check prices for Austrian Airlines. According to our data, you can fly for as low as $530. Users have also found prices from $531 and $538 on Delta and Air Canada, respectively.

  • What are the most reliable airlines from London Heathrow Airport to Chicago?

    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 on time: Air Canada (84%), Austrian Airlines (84%), United Airlines (84%).

  • What are the cheapest flights from London Heathrow Airport to Chicago?

    On average you can expect to pay $1,663 for a flight from London Heathrow Airport to Chicago. The cheapest flight overall is $532 while the most popular route, (London Heathrow - Chicago O'Hare Intl) is currently priced at $498.

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

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

  • How can I find direct flights from Heathrow to Chicago?

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to Chicago?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of $478). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of $673). 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?

Book flights to Chicago if you plan to visit one of these locations
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Top 10 airlines flying from Heathrow to Chicago

Discover the top 10 airlines that operate flights from Heathrow to Chicago. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$632FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$451Average$565FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$485Average$709FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$553Average$762FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$572Average$816FlexibilityNo cancel feeOn-time71%
IberiaCheapest$599Average$794FlexibilityNo cancel feeOn-time77%
FinnairCheapest$626Average$852FlexibilityNo cancel feeOn-time76%
Brussels AirlinesCheapest$633Average$832FlexibilityNo cancel feeOn-timeN/A

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