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$516+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
Jan 26 — Feb 21
Mon 1/26
Mon 2/2
1 adult, Economy
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Find cheap flights from Heathrow 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or September, booked 45 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap 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 December 27, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/314:20 pmLHR - ORD
1 stop32h 32mAustrian Airlines
Wed 1/79:05 pmORD - LHR
Nonstop8h 10mAustrian Airlines
Deal found 12/26$655
This FlightHub deal was found by Cheapflights users on 12/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:15 pmLHR - ORD
1 stop11h 05mIcelandair
Thu 1/226:30 pmORD - LHR
1 stop10h 20mIcelandair
Deal found 12/26$927
This Mytrip deal was found by Cheapflights users on 12/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/273:40 pmLHR - ORD
2 stops34h 20mMultiple Airlines
Sat 1/315:53 pmORD - LHR
1 stop20h 17mMultiple Airlines
Deal found 12/27$939
This JetBlue deal was found by Cheapflights users on 12/25. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:05 amLHR - ORD
1 stop19h 59mJetBlue
Thu 1/227:45 amORD - LHR
1 stop17h 10mJetBlue
Deal found 12/25$941
This Mytrip deal was found by Cheapflights users on 12/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:55 pmLHR - ORD
2 stops33h 10mMultiple Airlines
Sat 1/3110:00 amORD - LHR
2 stops20h 50mMultiple Airlines
Deal found 12/26$983
This TravelUp deal was found by Cheapflights users on 12/26. 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 12/317:50 amLHR - ORD
2 stops33h 10mAer Lingus
Wed 1/79:00 pmORD - LHR
1 stop12h 35mAer Lingus
Deal found 12/26$1,016
This Kiwi.com deal was found by Cheapflights users on 12/25. 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 12/257:55 pmLHR - ORD
1 stop25h 30mMultiple Airlines
Mon 12/299:50 pmORD - LHR
1 stop13h 15mMultiple Airlines
Deal found 12/25$1,037
This Delta deal was found by Cheapflights users on 12/25. 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.
Fri 12/266:30 amLHR - MDW
2 stops15h 50mDelta
Mon 12/299:29 amMDW - LHR
1 stop17h 16mDelta
Deal found 12/25$1,346
This Delta deal was found by Cheapflights users on 12/25. 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.
Thu 12/2511:30 amLHR - MDW
2 stops16h 52mDelta
Mon 12/2911:48 amMDW - LHR
1 stop13h 17mDelta
Deal found 12/25$1,352
This Virgin Atlantic deal was found by Cheapflights users on 12/26. 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.
Wed 12/316:30 amLHR - MDW
2 stops21h 52mVirgin Atlantic
Wed 1/711:21 amMDW - LHR
1 stop13h 04mVirgin Atlantic
Deal found 12/26$1,373
This Virgin Atlantic deal was found by Cheapflights users on 12/26. 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.
Tue 12/306:30 amLHR - MDW
2 stops15h 50mVirgin Atlantic
Tue 1/69:32 amMDW - LHR
2 stops14h 53mVirgin Atlantic
Deal found 12/26$1,493
This Delta deal was found by Cheapflights users on 12/27. 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.
Tue 12/306:30 amLHR - MDW
2 stops15h 50mDelta
Sun 1/49:29 amMDW - LHR
1 stop17h 16mDelta
Deal found 12/27$1,599

Find 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 December 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$561
(TravelUp)

One-way from

$516
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$818

Good round-trip deal

$766 or less

Good one-way deal

$662 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 ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 27, 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

Thu 3/19

9:00 am-5:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Sat 3/28

4:25 pm-5:45 am

Nonstop8h 20m

$563

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 2/21

6:40 am-4:45 pm

1 stop16h 05m

Chicago O'Hare Intl

Sat 2/28

7:20 pm-4:25 pm

2 stops15h 05m

$565

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/19

12:10 pm-7:15 pm

1 stop13h 05m

Chicago O'Hare Intl

Fri 1/30

6:45 pm-8:35 am

Nonstop7h 50m

$573

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 1/24

1:35 pm-5:00 pm

Nonstop9h 25m

Chicago O'Hare Intl

Fri 1/30

9:05 pm-11:15 am

Nonstop8h 10m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/22

7:40 am-11:00 am

Nonstop9h 20m

Chicago O'Hare Intl

Sun 2/1

5:50 pm-7:55 am

Nonstop8h 05m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/8

10:25 am-1:45 pm

Nonstop9h 20m

Chicago O'Hare Intl

Wed 1/14

1:00 pm-10:50 am

1 stop15h 50m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/22

7:40 am-11:00 am

Nonstop9h 20m

Chicago O'Hare Intl

Sun 1/25

5:50 pm-7:55 am

Nonstop8h 05m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 2/28

7:40 am-11:00 am

Nonstop9h 20m

Chicago O'Hare Intl

Tue 3/3

3:45 pm-5:55 am

Nonstop8h 10m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 2/14

1:35 pm-5:00 pm

Nonstop9h 25m

Chicago O'Hare Intl

Mon 2/23

9:15 pm-11:15 am

Nonstop8h 00m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 1/21

7:40 am-11:00 am

Nonstop9h 20m

Chicago O'Hare Intl

Sun 2/1

5:50 pm-7:55 am

Nonstop8h 05m

$578

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 41 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 December.
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
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star
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 December 19, 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 $476). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of $671). 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 December 27, 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 33% on your trip compared to booking a flight in the afternoon.

Weekly flight availability from London Heathrow Airport to Chicago

Explore weekly flight availability from Heathrow 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 December 27, 2025.

The most flights from LHR to CHI are scheduled on a Saturday (44 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (30 on average).

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 80% 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 08m.

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 02m.

How often are flights from London to Chicago delayed?

About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 172 minutes.

What is the most punctual flight time for London to Chicago flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Chicago flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

The best insider tips for London Heathrow Airport to Chicago flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
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
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
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
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
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
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
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 December 27, 2025.
Get a feel of what it's like to fly with Austrian 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.
Austrian Airlines
7.6
Good
884 reviews

Comfort

7.3

Boarding

7.6

Overall

7.6

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Austrian Airlines
7.6
Good
884 reviews
Austrian Airlines
7.6
Good
884 reviews

Comfort

7.3

Boarding

7.6

Overall

7.6

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
American Airlines
7.2
Good
11,068 reviews
Austrian Airlines
7.6
Good
884 reviews

Comfort

7.3

Boarding

7.6

Overall

7.6

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Aer Lingus
7.2
Good
1,412 reviews
Austrian Airlines
7.6
Good
884 reviews

Comfort

7.3

Boarding

7.6

Overall

7.6

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Icelandair
7.0
Good
592 reviews
Austrian Airlines
7.6
Good
884 reviews

Comfort

7.3

Boarding

7.6

Overall

7.6

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
British Airways
6.7
Okay
7,618 reviews
Austrian Airlines
7.6
Good
884 reviews

Comfort

7.3

Boarding

7.6

Overall

7.6

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.

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?

    United Airlines, Scandinavian Airlines, and British Airways can get you from London Heathrow Airport to Chicago in just under 13h 05m. Your travel time can differ by up to 3h. 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 Scandinavian Airlines. According to our data, you can fly for as low as $288. Users have also found prices from $400 and $472 on TAP AIR PORTUGAL and Icelandair, 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: Austrian Airlines (88%), Brussels Airlines (88%), Lufthansa (88%).

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

    On average you can expect to pay $1,724 for a flight from London Heathrow Airport to Chicago. The cheapest flight overall is $496 while the most popular route, (London Heathrow - Chicago O'Hare Intl) is currently priced at $448.

  • 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 $476). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of $671). 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
Lansing
Merrillville
Hammond
Porter
Benton Harbor

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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 December 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$672FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$451Average$544FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$485Average$613FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$552Average$776FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$784FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$558Average$778FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$572Average$784FlexibilityNo cancel feeOn-time71%
FinnairCheapest$625Average$769FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$720Average$830FlexibilityNo cancel feeOn-time76%

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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.