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Cheap flights from London Heathrow Airport to Chicago from £394

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Chicago departing on 2/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to Chicago

Cheap return flights

American Airlines Logo
08:20 - 15:45LHR-ORD
13h 25m1 stop
American Airlines Logo
16:28 - 09:40ORD-LHR
11h 12m1 stop
£394American Airlines
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Thu, 2 Oct - Wed, 8 Oct
American Airlines Logo
07:40 - 15:45LHR-ORD
14h 05m1 stop
American Airlines Logo
14:41 - 08:05ORD-LHR
11h 24m1 stop
£394American Airlines
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Fri, 3 Oct - Tue, 7 Oct
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
39h 05m2 stops
£396Scandinavian Airlines
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Mon, 8 Dec - Fri, 9 Jan
Scandinavian Airlines Logo
10:20 - 18:45LHR-ORD
13h 25m1 stop
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
£397Scandinavian Airlines
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Thu, 30 Oct - Thu, 6 Nov
Icelandair Logo
12:15 - 17:20LHR-ORD
11h 05m1 stop
Icelandair Logo
18:30 - 19:30ORD-LHR
19h 00m1 stop
£398Icelandair
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Sun, 14 Dec - Thu, 15 Jan
British Airways Logo
12:35 - 15:25LHR-ORD
8h 50mdirect
British Airways Logo
21:45 - 11:35ORD-LHR
7h 50mdirect
£399British Airways
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Fri, 7 Nov - Mon, 10 Nov
British Airways Logo
15:45 - 18:45LHR-ORD
9h 00mdirect
British Airways Logo
20:45 - 10:25ORD-LHR
7h 40mdirect
£400British Airways
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Sat, 22 Nov - Fri, 5 Dec
Finnair Logo
09:45 - 16:13LHR-ORD
12h 28m1 stop
Finnair Logo
15:10 - 07:50ORD-LHR
10h 40m1 stop
£405Finnair
Find Deal
Thu, 9 Oct - Wed, 15 Oct
Icelandair Logo
13:05 - 18:15LHR-ORD
11h 10m1 stop
Icelandair Logo
19:25 - 11:55ORD-LHR
10h 30m1 stop
£407Icelandair
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Wed, 15 Oct - Sun, 19 Oct
Finnair Logo
17:00 - 07:25LHR-ORD
20h 25m2 stops
Finnair Logo
09:41 - 06:20ORD-LHR
14h 39m1 stop
£415Finnair
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Sun, 5 Oct - Sun, 12 Oct

American Airlines flights from London Heathrow Airport to Chicago

Our best American Airlines deals on London Heathrow Airport to Chicago flight tickets
American Airlines
2 Oct
LHR08:20London Heathrow
13h 25m
1 stop
ORD15:45Chicago O'Hare Intl
8 Oct
ORD16:28Chicago O'Hare Intl
11h 12m
1 stop
LHR09:40London Heathrow
£394
Find similar
American Airlines
3 Oct
LHR07:40London Heathrow
14h 05m
1 stop
ORD15:45Chicago O'Hare Intl
7 Oct
ORD14:41Chicago O'Hare Intl
11h 24m
1 stop
LHR08:05London Heathrow
£394
Find similar
American Airlines
20 Sept
LHR08:55London Heathrow
14h 28m
2 stops
ORD17:23Chicago O'Hare Intl
21 Sept
ORD18:35Chicago O'Hare Intl
11h 55m
1 stop
LHR12:30London Heathrow
£417
Find similar

British Airways flights from London Heathrow Airport to Chicago

Our best British Airways deals on London Heathrow Airport to Chicago flight tickets
British Airways
23 Sept
LHR12:15London Heathrow
8h 35m
ORD14:50Chicago O'Hare Intl
3 Oct
ORD22:35Chicago O'Hare Intl
7h 40m
LHR12:15London Heathrow
£397
Find similar
British Airways
22 Sept
LHR12:15London Heathrow
8h 35m
ORD14:50Chicago O'Hare Intl
29 Sept
ORD20:40Chicago O'Hare Intl
7h 50m
LHR10:30London Heathrow
£398
Find similar
British Airways
7 Nov
LHR12:35London Heathrow
8h 50m
ORD15:25Chicago O'Hare Intl
10 Nov
ORD21:45Chicago O'Hare Intl
7h 50m
LHR11:35London Heathrow
£399
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 16 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 2/10

08:20-15:45

1 stop13h 25m

Chicago O'Hare Intl

Wed 8/10

16:28-09:40

1 stop11h 12m

£394

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/10

07:40-15:45

1 stop14h 05m

Chicago O'Hare Intl

Tue 7/10

14:41-08:05

1 stop11h 24m

£394

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 8/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Fri 9/1

19:20-16:25

2 stops39h 05m

£396

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 30/10

10:20-18:45

1 stop13h 25m

Chicago O'Hare Intl

Thu 6/11

19:20-16:25

2 stops15h 05m

£397

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 14/12

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Thu 15/1

18:30-19:30

1 stop19h 00m

£398

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 7/11

12:35-15:25

Nonstop8h 50m

Chicago O'Hare Intl

Mon 10/11

21:45-11:35

Nonstop7h 50m

£399

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 22/11

15:45-18:45

Nonstop9h 00m

Chicago O'Hare Intl

Fri 5/12

20:45-10:25

Nonstop7h 40m

£400

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/10

09:45-16:13

1 stop12h 28m

Chicago O'Hare Intl

Wed 15/10

15:10-07:50

1 stop10h 40m

£405

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 15/10

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Sun 19/10

19:25-11:55

1 stop10h 30m

£407

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 5/10

17:00-07:25

2 stops20h 25m

Chicago O'Hare Intl

Sun 12/10

09:41-06:20

1 stop14h 39m

£415

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

How to get the cheapest flight ticket from London Heathrow Airport to Chicago

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London Heathrow Airport and Chicago?

What is the cheapest month to fly to Chicago?

The cheapest month to fly to Chicago from London Heathrow Airport is in February. Flight prices, which tend to average around £439, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Chicago from London Heathrow Airport during March instead. Flights to Chicago in March, while not as cheap as those in February, still average around £443.

What is the cheapest day to depart on your flight to Chicago?

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as £599. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Chicago is Saturday, with ticket prices averaging around £655.

What is the cheapest time of day to depart on your flight to Chicago?

Flying to Chicago from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £494 when looking at flights departing in the evening. Flights in the afternoon are often more expensive, with an average ticket price of £656.

What is the cheapest London Heathrow to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - Chicago flight prices

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around £532 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London Heathrow Airport for as low as £510 on momondo.

What cabin class options are available on London Heathrow to Chicago flights?

There are 4 cabin classes available to choose from on London Heathrow to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Chicago flights?

You could potentially save up to 7% on your flight if you consider stops on a London Heathrow Airport to Chicago flight.

How have London Heathrow Airport to Chicago flight prices changed over time?

As of September 2025, prices for London Heathrow Airport to Chicago flights are approximately 5% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Chicago according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Chicago (LHR to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Chicago

Best price found

£491

Fastest flight time

8h 25m

Direct flights

Every day

Airports in Chicago

1 airport
The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is £491. The best return flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is £494.
The fastest flight from London Heathrow Airport to Chicago takes 8h 25m
Direct flights go from London Heathrow Airport to Chicago every day.
There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)
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  • How far is London Heathrow to Chicago by plane?

    The distance between London Heathrow and Chicago is about 3933.5 mi. Typically, this will take 8h 40m by plane in normal conditions.

  • When did momondo last update prices for flights from London Heathrow Airport to Chicago?

    Prices for flights from London Heathrow Airport to Chicago are updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Chicago?

  • How old do you have to be to fly from London Heathrow Airport to Chicago?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London Heathrow Airport to Chicago?

  • What is the most popular airline from London Heathrow Airport to Chicago?

Best airlines flying from London Heathrow Airport to Chicago

Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £338Free CancellationRating
7.0
544 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom £350Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £364Free CancellationRating
7.1
1,975 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom £364Free CancellationRating
7.2
1,270 reviews
Search Aer Lingus flights
Virgin AtlanticPriceFrom £376Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
Brussels AirlinesPriceFrom £389Free CancellationRating
7.2
359 reviews
Search Brussels Airlines flights
LufthansaPriceFrom £391Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom £397Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom £400Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
United AirlinesPriceFrom £404Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights

  • Austrian Airlines Flights From London Heathrow Airport to Chicago

    Austrian Airlines is one of the most popular airlines flying from London Heathrow Airport to Chicago, operating 21 flights/week on average for this route. A good Austrian Airlines flight deal for London Heathrow Airport to Chicago starts from £539 round-trip, up to an average price of £769. Our users have rated Austrian Airlines at 7.6/10.

  • Finnair Flights From London Heathrow Airport to Chicago

    £587 is the best Finnair flight deal from London Heathrow Airport to Chicago found on momondo over the last 72 hours. The average Finnair ticket price found was closer to £753, however, with flight time and availability significantly affecting the price. Finnair (7.6/10 from 1,323 user reviews) flies into Chicago from London Heathrow Airport 27 times in an average week so prices can vary.

Why use momondo?

Why should I use momondo to find a flight deal from London to Chicago?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Chicago. momondo saves you time and could save you money on your trip.

Can I find flights from London to Chicago with flexible booking policies on momondo?

Flights from London to Chicago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Chicago?

momondo provides multiple filters to help you find the best flight to Chicago from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?

Yes. momondo can track prices for London to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport