HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$406+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from London Heathrow to Chicago are usually found in February or March, booked 77 days in advance, depart on a Thursday or Wednesday 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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$527
(Orbitz)

One-way from

$406
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$604

Good round-trip deal

$640 or less

Good one-way deal

$646 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. 9% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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

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 February 22, 2025.

This Orbitz deal was found by Cheapflights users on 2/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/237:25 pmLHR - ORD
1 stop24h 40mAustrian Airlines
Sun 3/304:05 pmORD - LHR
Nonstop8h 15mAustrian Airlines
Deal found 2/21$527
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Wed 4/238:40 amLHR - ORD
1 stop13h 15mUnited Airlines
Wed 4/309:20 pmORD - LHR
Nonstop8h 25mUnited Airlines
Deal found 2/21$528
This World Air Fares deal was found by Cheapflights users on 2/21. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/238:30 amLHR - ORD
Nonstop9h 05mLufthansa
Mon 4/284:05 pmORD - LHR
Nonstop8h 15mLufthansa
Deal found 2/21$533
This Cheapflightsfares deal was found by Cheapflights users on 2/21. 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.
Thu 5/112:15 pmLHR - ORD
Nonstop8h 30mBritish Airways
Mon 5/55:35 pmORD - LHR
Nonstop7h 50mBritish Airways
Deal found 2/21$539
This TravelUp deal was found by Cheapflights users on 2/20. 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 3/206:30 amLHR - MDW
2 stops16h 32mKLM
Thu 3/272:55 pmMDW - LHR
1 stop10h 55mKLM
Deal found 2/20$541
This StudentUniverse deal was found by Cheapflights users on 2/20. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/222:25 pmLHR - ORD
Nonstop8h 35mFinnair
Tue 4/295:45 pmORD - LHR
Nonstop7h 35mFinnair
Deal found 2/20$542
This The Travel House deal was found by Cheapflights users on 2/21. 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.
Wed 4/301:05 pmLHR - ORD
1 stop11h 15mIcelandair
Tue 5/2710:15 pmORD - LHR
1 stop31h 40mIcelandair
Deal found 2/21$545
This oojo deal was found by Cheapflights users on 2/21. 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.
Sun 2/236:00 amLHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Sun 3/28:25 pmORD - LHR
1 stop20h 15mTAP AIR PORTUGAL
Deal found 2/21$547
This Orbitz deal was found by Cheapflights users on 2/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/237:25 pmLHR - ORD
1 stop24h 40mMultiple Airlines
Sun 3/309:05 pmORD - LHR
2 stops17h 55mMultiple Airlines
Deal found 2/21$556
This lol.travel deal was found by Cheapflights users on 2/21. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/16:00 pmLHR - ORD
1 stop22h 04mAir Canada
Mon 3/173:35 pmORD - LHR
1 stop10h 35mAir Canada
Deal found 2/21$557
This SWISS deal was found by Cheapflights users on 2/21. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/216:00 amLHR - ORD
1 stop12h 55mSWISS
Mon 3/245:10 pmORD - LHR
2 stops18h 30mSWISS
Deal found 2/21$558
This TravelUp deal was found by Cheapflights users on 2/20. 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 3/209:10 amLHR - MDW
1 stop14h 08mAir France
Thu 3/272:55 pmMDW - LHR
1 stop10h 55mAir France
Deal found 2/20$558

Find flights from Heathrow to Chicago within your budget

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 February 22, 2025.

Fly from

Heathrow

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 3/23

7:25 pm-3:05 pm

1 stop24h 40m

Chicago O'Hare Intl

Sun 3/30

4:05 pm-6:20 am

Nonstop8h 15m

$527

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/23

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Wed 4/30

9:20 pm-11:45 am

Nonstop8h 25m

$528

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/23

8:30 am-11:35 am

Nonstop9h 05m

Chicago O'Hare Intl

Mon 4/28

4:05 pm-6:20 am

Nonstop8h 15m

$533

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 3/11

8:55 am-7:37 pm

2 stops15h 42m

Chicago O'Hare Intl

Sat 3/29

2:05 pm-9:00 am

2 stops13h 55m

$537

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/1

12:15 pm-2:45 pm

Nonstop8h 30m

Chicago O'Hare Intl

Mon 5/5

5:35 pm-7:25 am

Nonstop7h 50m

$539

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 3/20

6:30 am-6:02 pm

2 stops16h 32m

Chicago Midway

Thu 3/27

2:55 pm-6:50 am

1 stop10h 55m

$541

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 4/22

2:25 pm-5:00 pm

Nonstop8h 35m

Chicago O'Hare Intl

Tue 4/29

5:45 pm-7:20 am

Nonstop7h 35m

$542

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/30

1:05 pm-6:20 pm

1 stop11h 15m

Chicago O'Hare Intl

Tue 5/27

10:15 pm-11:55 am

1 stop31h 40m

$545

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 3/10

5:10 pm-1:55 pm

1 stop25h 45m

Chicago O'Hare Intl

Tue 3/25

5:55 pm-1:00 pm

2 stops14h 05m

$554

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 3/23

7:25 pm-3:05 pm

1 stop24h 40m

Chicago O'Hare Intl

Sun 3/30

9:05 pm-9:00 pm

2 stops17h 55m

$556

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 35 results
1
2
3
4

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
business-class.comPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Chicago flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Travel insights for flights from Heathrow to Chicago

Get recent, data-driven insights about flights from Heathrow to Chicago including ideal travel times, pricing trends, and more.

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 February 14, 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 February 22, 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 34% 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. Friday 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 February 22, 2025.

The most flights from LHR to CHI are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (33 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 February 22, 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair 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
8,213 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,213 reviews
Delta
8.0
Very good
8,213 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,331 reviews
Delta
8.0
Very good
8,213 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,271 reviews
Delta
8.0
Very good
8,213 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.5
Good
771 reviews
Delta
8.0
Very good
8,213 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,568 reviews
Delta
8.0
Very good
8,213 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $527, Austrian Airlines will fly you from London Heathrow Airport to Chicago and back. In addition to Austrian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Lufthansa - these airlines can fly you to your destination from $528 and $530, respectively. Austrian Airlines is currently priced 27% 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 WestJet. According to our data, you can fly for as low as $422. Users have also found prices from $505 and $515 on Icelandair and Aer Lingus, 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 (91%), Austrian Airlines (91%), United Airlines (91%).

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

    On average you can expect to pay $1,316 for a flight from London Heathrow Airport to Chicago. The cheapest flight overall is $547 while the most popular route, (London Heathrow - Chicago O'Hare Intl) is currently priced at $465.

  • 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
New Buffalo
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton

Browse thousands of different options on Cheapflights for your next trip

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

Top 10 airlines flying from 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$587FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$666FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$729FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$556Average$782FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$576Average$736FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$579Average$963FlexibilityNo cancel feeOn-time69%
IberiaCheapest$582Average$793FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$589Average$797FlexibilityNo cancel feeOn-time70%
FinnairCheapest$607Average$866FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$660Average$1,067FlexibilityNo cancel feeOn-time76%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.