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$518+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or March, booked 70 days in advance, depart on a Friday or Tuesday and return on a Wednesday

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 June 12, 2025.

Round-trip from

$557
(American Airlines)

One-way from

$518
(Gurufare)

Popular in

August

Cheapest in

February

Average price

$744

Good round-trip deal

$664 or less

Good one-way deal

$585 or less
From London Heathrow to Chicago (CHI)
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One-way flight from London Heathrow to Chicago (CHI)
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Highest demand for flights based on searches. 10% potential increase in price ($81 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from London Heathrow to Chicago (CHI).
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Price to beat on a one-way flight from London Heathrow to Chicago (CHI).
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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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:15 amLHR - ORD
1 stop14h 00mAmerican Airlines
Wed 9/171:59 pmORD - LHR
1 stop10h 21mAmerican Airlines
Deal found 6/10$557
This oojo deal was found by Cheapflights users on 6/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:40 pmLHR - ORD
1 stop27h 30mScandinavian Airlines
Mon 10/278:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 6/10$558
This Netflights deal was found by Cheapflights users on 6/10. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/99:50 amLHR - ORD
1 stop11h 55mBritish Airways
Sat 9/2010:20 pmORD - LHR
1 stop10h 35mBritish Airways
Deal found 6/10$559
This Mytrip deal was found by Cheapflights users on 6/12. 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.
Wed 9/101:30 pmLHR - ORD
1 stop12h 25mLufthansa
Sat 9/2010:30 pmORD - LHR
1 stop13h 10mLufthansa
Deal found 6/12$560
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:30 amLHR - ORD
1 stop14h 10mKLM
Wed 9/171:16 pmORD - LHR
1 stop11h 29mKLM
Deal found 6/10$561
This Delta deal was found by Cheapflights users on 6/12. 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.
Mon 9/88:40 amLHR - MDW
2 stops15h 57mDelta
Thu 9/1810:35 amMDW - LHR
1 stop14h 10mDelta
Deal found 6/12$562
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2711:45 amLHR - ORD
2 stops16h 09mDelta
Wed 9/1010:15 amORD - LHR
1 stop14h 30mDelta
Deal found 6/10$564
This Finnair deal was found by Cheapflights users on 6/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:30 amLHR - ORD
1 stop16h 20mFinnair
Wed 9/1010:35 pmORD - LHR
Nonstop7h 40mFinnair
Deal found 6/10$565
This Virgin Atlantic deal was found by Cheapflights users on 6/11. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:15 amLHR - MDW
2 stops16h 08mVirgin Atlantic
Thu 10/210:35 amMDW - LHR
2 stops13h 45mVirgin Atlantic
Deal found 6/11$567
This oojo deal was found by Cheapflights users on 6/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/138:00 amLHR - ORD
1 stop14h 30mTAP AIR PORTUGAL
Sat 9/206:15 pmORD - LHR
1 stop12h 30mTAP AIR PORTUGAL
Deal found 6/11$568
This TravelUp deal was found by Cheapflights users on 6/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:40 amLHR - ORD
1 stop11h 30mVirgin Atlantic
Sat 9/202:10 pmORD - LHR
1 stop10h 35mVirgin Atlantic
Deal found 6/10$571
This TravelUp deal was found by Cheapflights users on 6/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:40 amLHR - MDW
2 stops15h 57mKLM
Thu 9/1110:35 amMDW - LHR
1 stop14h 10mKLM
Deal found 6/10$578

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 June 12, 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

Mon 9/1

6:15 am-2:15 pm

1 stop14h 00m

Chicago O'Hare Intl

Mon 9/22

1:59 pm-6:20 am

1 stop10h 21m

$557

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/9

9:50 am-3:45 pm

1 stop11h 55m

Chicago O'Hare Intl

Sat 9/20

10:20 pm-2:55 pm

1 stop10h 35m

$559

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/10

1:30 pm-7:55 pm

1 stop12h 25m

Chicago O'Hare Intl

Sat 9/20

10:30 pm-5:40 pm

1 stop13h 10m

$560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/8

6:30 am-2:40 pm

1 stop14h 10m

Chicago O'Hare Intl

Wed 9/17

1:16 pm-6:45 am

1 stop11h 29m

$561

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 9/8

8:40 am-6:37 pm

2 stops15h 57m

Chicago Midway

Thu 9/18

10:35 am-6:45 am

1 stop14h 10m

$562

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 8/27

9:30 am-5:50 pm

1 stop14h 20m

Chicago O'Hare Intl

Wed 9/10

10:35 pm-12:15 pm

Nonstop7h 40m

$563

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 8/27

11:45 am-9:54 pm

2 stops16h 09m

Chicago O'Hare Intl

Wed 9/10

10:15 am-6:45 am

1 stop14h 30m

$564

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 9/23

6:15 am-4:23 pm

2 stops16h 08m

Chicago Midway

Thu 10/2

10:35 am-6:20 am

2 stops13h 45m

$567

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/3

6:45 pm-12:35 pm

1 stop23h 50m

Chicago O'Hare Intl

Sat 9/13

6:15 pm-12:45 pm

1 stop12h 30m

$569

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/9

8:40 am-2:10 pm

1 stop11h 30m

Chicago O'Hare Intl

Sat 9/20

2:10 pm-6:45 am

1 stop10h 35m

$571

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 33 results
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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
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
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
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
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 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 June 9, 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 70 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of $245). Flying from London Heathrow Airport to Chicago 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 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 June 12, 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 35% on your trip compared to booking a flight in the afternoon.

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

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

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

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 June 12, 2025.

The most flights from LHR to CHI are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 on average).

Rainfall in Chicago by month

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

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

Temperature in Chicago by month

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

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

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 June 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from London to Chicago. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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 Heathrow to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Currently priced at $557, American Airlines will fly you from London Heathrow Airport to Chicago and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and British Airways - these airlines can fly you to your destination from $558 and $559, respectively. American Airlines is currently priced 23% 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 Aer Lingus. According to our data, you can fly for as low as $518. Users have also found prices from $544 and $563 on TAP AIR PORTUGAL and British Airways, 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 (92%), Austrian Airlines (92%), United Airlines (92%).

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

    On average you can expect to pay $2,749 for a flight from London Heathrow Airport to Chicago. The cheapest flight overall is $525 while the most popular route, (London Heathrow - Chicago O'Hare Intl) is currently priced at $441.

  • 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of $245). Flying from London Heathrow Airport to Chicago 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Merrillville
Lansing
Benton Harbor
Porter
Hammond
Valparaiso
Chesterton

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$569FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$569FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$776FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$538Average$821FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$551Average$766FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$568Average$713FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$776FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$583Average$794FlexibilityNo cancel feeOn-time71%
Austrian AirlinesCheapest$586Average$987FlexibilityNo cancel feeOn-time78%
FinnairCheapest$607Average$809FlexibilityNo cancel feeOn-time76%

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