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Cheap flights from London Heathrow Airport to Chicago from £400

This is the cheapest one-way 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 19/4. 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

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
Scandinavian Airlines Logo
19:20 - 16:00ORD-LHR
14h 40m1 stop
£404Scandinavian Airlines
Find Deal
Thu, 13 Nov - Sun, 23 Nov
Scandinavian Airlines Logo
10:20 - 16:45LHR-ORD
12h 25m1 stop
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
£405Scandinavian Airlines
Find Deal
Fri, 14 Nov - Sun, 30 Nov
Icelandair Logo
12:15 - 17:20LHR-ORD
11h 05m1 stop
Icelandair Logo
18:30 - 10:50ORD-LHR
10h 20m1 stop
£428Icelandair
Find Deal
Tue, 25 Nov - Tue, 2 Dec
Icelandair Logo
12:15 - 17:20LHR-ORD
11h 05m1 stop
Icelandair Logo
18:30 - 19:30ORD-LHR
19h 00m1 stop
£431Icelandair
Find Deal
Tue, 25 Nov - Tue, 9 Dec
Virgin Atlantic Logo
13:00 - 18:34LHR-MDW
11h 34m1 stop
Virgin Atlantic Logo
17:59 - 08:45MDW-LHR
9h 46m1 stop
£518Virgin Atlantic
Find Deal
Wed, 4 Mar - Wed, 25 Mar
Virgin Atlantic Logo
13:00 - 18:34LHR-MDW
11h 34m1 stop
Virgin Atlantic Logo
17:59 - 08:45MDW-LHR
9h 46m1 stop
£518Virgin Atlantic
Find Deal
Mon, 2 Mar - Mon, 9 Mar
Delta Logo
13:00 - 08:54LHR-MDW
25h 54m1 stop
Delta Logo
13:14 - 08:45MDW-LHR
13h 31m1 stop
£519Delta
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Mon, 1 Dec - Thu, 11 Dec
KLM Logo
08:55 - 16:34LHR-MDW
13h 39m1 stop
KLM Logo
13:50 - 07:05MDW-LHR
11h 15m1 stop
£520KLM
Find Deal
Wed, 3 Dec - Mon, 8 Dec
Delta Logo
08:40 - 18:18LHR-MDW
15h 38m2 stops
Delta Logo
12:50 - 07:50MDW-LHR
13h 00m1 stop
£521Delta
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Wed, 3 Dec - Wed, 17 Dec
KLM Logo
08:55 - 16:25LHR-MDW
13h 30m1 stop
KLM Logo
17:59 - 08:45MDW-LHR
9h 46m1 stop
£543KLM
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Mon, 2 Mar - Tue, 10 Mar

Icelandair flights from London Heathrow Airport to Chicago

Our best Icelandair deals on London Heathrow Airport to Chicago flight tickets
Icelandair
25 Nov
LHR12:15London Heathrow
11h 05m
1 stop
ORD17:20Chicago O'Hare Intl
2 Dec
ORD18:30Chicago O'Hare Intl
10h 20m
1 stop
LHR10:50London Heathrow
£428
Find similar
Icelandair
25 Nov
LHR12:15London Heathrow
11h 05m
1 stop
ORD17:20Chicago O'Hare Intl
9 Dec
ORD18:30Chicago O'Hare Intl
19h 00m
1 stop
LHR19:30London Heathrow
£431
Find similar
Icelandair
4 Nov
LHR12:15London Heathrow
11h 05m
1 stop
ORD17:20Chicago O'Hare Intl
12 Nov
ORD18:30Chicago O'Hare Intl
19h 00m
1 stop
LHR19:30London Heathrow
£436
Find similar

Scandinavian Airlines flights from London Heathrow Airport to Chicago

Our best Scandinavian Airlines deals on London Heathrow Airport to Chicago flight tickets
Scandinavian Airlines
13 Nov
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
23 Nov
ORD19:20Chicago O'Hare Intl
14h 40m
1 stop
LHR16:00London Heathrow
£404
Find similar
Scandinavian Airlines
14 Nov
LHR10:20London Heathrow
12h 25m
1 stop
ORD16:45Chicago O'Hare Intl
30 Nov
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow
£405
Find similar
Scandinavian Airlines
12 Dec
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
7 Jan
ORD19:20Chicago O'Hare Intl
14h 40m
1 stop
LHR16:00London Heathrow
£406
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 31 October 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 13/11

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 23/11

19:20-16:00

1 stop14h 40m

£404

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 14/11

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sun 30/11

19:20-16:25

2 stops15h 05m

£405

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 25/11

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Tue 2/12

18:30-10:50

1 stop10h 20m

£428

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 25/11

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Tue 9/12

18:30-19:30

1 stop19h 00m

£431

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 4/3

13:00-18:34

1 stop11h 34m

Chicago Midway

Wed 25/3

17:59-08:45

1 stop9h 46m

£518

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 2/3

13:00-18:34

1 stop11h 34m

Chicago Midway

Mon 9/3

17:59-08:45

1 stop9h 46m

£518

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 1/12

13:00-08:54

1 stop25h 54m

Chicago Midway

Thu 11/12

13:14-08:45

1 stop13h 31m

£519

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 3/12

08:55-16:34

1 stop13h 39m

Chicago Midway

Mon 8/12

13:50-07:05

1 stop11h 15m

£520

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 3/12

08:40-18:18

2 stops15h 38m

Chicago Midway

Wed 17/12

12:50-07:50

1 stop13h 00m

£521

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 2/3

08:55-16:25

1 stop13h 30m

Chicago Midway

Tue 10/3

17:59-08:45

1 stop9h 46m

£543

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 £452, 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 September instead. Flights to Chicago in September, while not as cheap as those in February, still average around £455.

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 £623. 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 £685.

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 £510 when looking at flights departing in the evening. Flights in the afternoon are often more expensive, with an average ticket price of £684.

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 £555 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 £526 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 17% 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 October 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

£457

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 £457. The best return flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is £563.
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)
Search flight deals

  • 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 11h 05m 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 £347Free CancellationRating
7.1
562 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £351Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights
Scandinavian AirlinesPriceFrom £362Free CancellationRating
7.4
1,548 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £375Free CancellationRating
7.1
2,040 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom £377Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
Brussels AirlinesPriceFrom £393Free CancellationRating
7.2
369 reviews
Search Brussels Airlines flights
LufthansaPriceFrom £404Free CancellationRating
6.8
7,543 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom £412Free CancellationRating
7.6
862 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom £412Free CancellationRating
6.7
7,489 reviews
Search British Airways flights
United AirlinesPriceFrom £416Free CancellationRating
7.4
8,995 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 12 flights/week on average for this route. A good Austrian Airlines flight deal for London Heathrow Airport to Chicago starts from £412 round-trip, up to an average price of £614. Our users have rated Austrian Airlines at 7.6/10.

  • Finnair Flights From London Heathrow Airport to Chicago

    £437 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 £578, however, with flight time and availability significantly affecting the price. Finnair (7.6/10 from 1,333 user reviews) flies into Chicago from London Heathrow Airport 16 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