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Cheap flights from London Heathrow Airport to Chicago from €449

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 28/10. 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

United Airlines Logo
06:35 - 15:10LHR-ORD
13h 35m1 stop
United Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
€449United Airlines
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Tue, 28 Oct - Wed, 12 Nov
Lufthansa Logo
07:40 - 15:10LHR-ORD
12h 30m1 stop
Lufthansa Logo
15:45 - 05:55ORD-LHR
8h 10mdirect
€450Lufthansa
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Tue, 28 Oct - Wed, 3 Dec
United Airlines Logo
11:10 - 18:25LHR-ORD
13h 15m1 stop
United Airlines Logo
18:50 - 07:55ORD-LHR
8h 05mdirect
€451United Airlines
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Wed, 4 Mar - Tue, 10 Mar
Scandinavian Airlines Logo
19:30 - 16:45LHR-ORD
27h 15m1 stop
Scandinavian Airlines Logo
19:10 - 16:00ORD-LHR
14h 50m1 stop
€452Scandinavian Airlines
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Wed, 3 Dec - Sun, 11 Jan
Scandinavian Airlines Logo
07:05 - 16:45LHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
19:20 - 17:40ORD-LHR
16h 20m1 stop
€461Scandinavian Airlines
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Thu, 25 Dec - Wed, 31 Dec
British Airways Logo
06:15 - 17:33LHR-ORD
16h 18m2 stops
British Airways Logo
16:27 - 11:15ORD-LHR
13h 48m1 stop
€465British Airways
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Fri, 13 Mar - Sun, 15 Mar
British Airways Logo
09:50 - 15:45LHR-ORD
11h 55m1 stop
British Airways Logo
20:40 - 10:30ORD-LHR
7h 50mdirect
€472British Airways
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Fri, 3 Oct - Tue, 7 Oct
Multiple Airlines Logo
07:40 - 14:10LHR-ORD
12h 30m1 stop
Multiple Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
€479Multiple Airlines
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Thu, 4 Dec - Wed, 10 Dec
Austrian Airlines Logo
12:05 - 18:30LHR-ORD
12h 25m1 stop
Austrian Airlines Logo
15:45 - 05:55ORD-LHR
8h 10mdirect
€480Austrian Airlines
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Tue, 2 Dec - Tue, 13 Jan
Austrian Airlines Logo
07:40 - 12:00LHR-ORD
9h 20mdirect
Austrian Airlines Logo
18:50 - 07:55ORD-LHR
8h 05mdirect
€489Austrian Airlines
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Tue, 10 Mar - Sun, 15 Mar

Scandinavian Airlines flights from London Heathrow Airport to Chicago

Our best Scandinavian Airlines deals on London Heathrow Airport to Chicago flight tickets
Scandinavian Airlines
3 Dec
LHR19:30London Heathrow
27h 15m
1 stop
ORD16:45Chicago O'Hare Intl
11 Jan
ORD19:10Chicago O'Hare Intl
14h 50m
1 stop
LHR16:00London Heathrow
€452
Find similar
Scandinavian Airlines
25 Dec
LHR07:05London Heathrow
15h 40m
2 stops
ORD16:45Chicago O'Hare Intl
31 Dec
ORD19:20Chicago O'Hare Intl
16h 20m
1 stop
LHR17:40London Heathrow
€461
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Scandinavian Airlines
25 Dec
LHR07:05London Heathrow
15h 40m
2 stops
ORD16:45Chicago O'Hare Intl
31 Dec
ORD19:20Chicago O'Hare Intl
16h 20m
1 stop
LHR17:40London Heathrow
€462
Find similar

Austrian Airlines flights from London Heathrow Airport to Chicago

Our best Austrian Airlines deals on London Heathrow Airport to Chicago flight tickets
Austrian Airlines
2 Dec
LHR12:05London Heathrow
12h 25m
1 stop
ORD18:30Chicago O'Hare Intl
13 Jan
ORD15:45Chicago O'Hare Intl
8h 10m
LHR05:55London Heathrow
€480
Find similar
Austrian Airlines
27 Sept
LHR12:15London Heathrow
12h 15m
1 stop
ORD18:30Chicago O'Hare Intl
4 Oct
ORD12:55Chicago O'Hare Intl
12h 00m
1 stop
LHR06:55London Heathrow
€482
Find similar
Austrian Airlines
10 Mar
LHR07:40London Heathrow
9h 20m
ORD12:00Chicago O'Hare Intl
15 Mar
ORD18:50Chicago O'Hare Intl
8h 05m
LHR07:55London Heathrow
€489
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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 13,528 searches. Data last updated 18 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

Tue 28/10

06:35-15:10

1 stop13h 35m

Chicago O'Hare Intl

Wed 12/11

17:50-07:55

Nonstop8h 05m

€449

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 28/10

07:40-15:10

1 stop12h 30m

Chicago O'Hare Intl

Wed 3/12

15:45-05:55

Nonstop8h 10m

€450

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

11:10-18:25

1 stop13h 15m

Chicago O'Hare Intl

Tue 10/3

18:50-07:55

Nonstop8h 05m

€451

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/12

19:30-16:45

1 stop27h 15m

Chicago O'Hare Intl

Sun 11/1

19:10-16:00

1 stop14h 50m

€452

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/12

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Wed 31/12

19:20-17:40

1 stop16h 20m

€461

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/3

06:15-17:33

2 stops16h 18m

Chicago O'Hare Intl

Sun 15/3

16:27-11:15

1 stop13h 48m

€465

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/10

09:50-15:45

1 stop11h 55m

Chicago O'Hare Intl

Tue 7/10

20:40-10:30

Nonstop7h 50m

€472

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/12

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Wed 10/12

17:50-07:55

Nonstop8h 05m

€479

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 2/12

12:05-18:30

1 stop12h 25m

Chicago O'Hare Intl

Tue 13/1

15:45-05:55

Nonstop8h 10m

€480

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/3

07:40-12:00

Nonstop9h 20m

Chicago O'Hare Intl

Sun 15/3

18:50-07:55

Nonstop8h 05m

€489

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 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 €503, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in February, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €508.

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

On average, the least expensive day to fly to Chicago from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as €565. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Tuesday is €3,159.

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 €611 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 €585 on momondo.

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

There are 2 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.

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

Fastest flight time

8h 25m

Direct flights

Every day

Airports in Chicago

1 airport
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?

    A flight from London Heathrow to Chicago will travel around 6330.3 km. 9h 00m is a normal flight duration for this route.

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

    Prices for flights from London Heathrow Airport to Chicago were last updated today.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check 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 licence 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?

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?

momondo does allow users to show only those flights to Chicago from London which offer a flexible booking policy as well as other useful filters and features.

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?

If you are not ready to book a flight from London to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.

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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 25.6 km from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport