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Cheap flights from London Heathrow Airport to Chicago from £266

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 5/9. 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

Logo
09:30 - 19:55LHR-ORD
16h 25m1 stop
Logo
19:05 - 19:20ORD-LHR
18h 15m1 stop
£340
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Tue, 23 Sep - Tue, 30 Sep
United Airlines Logo
11:05 - 12:05LHR-ORD
31h 00m1 stop
United Airlines Logo
10:35 - 21:00ORD-LHR
28h 25m1 stop
£348United Airlines
Find Deal
Thu, 25 Sep - Sat, 27 Sep
Lufthansa Logo
09:30 - 19:55LHR-ORD
16h 25m1 stop
Lufthansa Logo
22:30 - 20:40ORD-LHR
16h 10m1 stop
£362Lufthansa
Find Deal
Wed, 17 Sep - Sun, 28 Sep
Lufthansa Logo
10:30 - 19:55LHR-ORD
15h 25m1 stop
Lufthansa Logo
22:30 - 17:40ORD-LHR
13h 10m1 stop
£366Lufthansa
Find Deal
Thu, 11 Sep - Mon, 22 Sep
Aer Lingus Logo
08:50 - 14:00LHR-ORD
11h 10m1 stop
Aer Lingus Logo
21:15 - 13:55ORD-LHR
10h 40m1 stop
£367Aer Lingus
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Sat, 6 Sep - Wed, 10 Sep
Aer Lingus Logo
08:50 - 14:00LHR-ORD
11h 10m1 stop
Aer Lingus Logo
21:15 - 13:55ORD-LHR
10h 40m1 stop
£368Aer Lingus
Find Deal
Thu, 18 Sep - Sat, 4 Oct
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
Scandinavian Airlines Logo
19:20 - 18:30ORD-LHR
17h 10m1 stop
£382Scandinavian Airlines
Find Deal
Thu, 20 Nov - Sun, 7 Dec
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
Scandinavian Airlines Logo
19:20 - 17:40ORD-LHR
16h 20m1 stop
£384Scandinavian Airlines
Find Deal
Thu, 6 Nov - Sun, 9 Nov
Icelandair Logo
21:25 - 21:15LHR-ORD
29h 50m1 stop
Icelandair Logo
19:25 - 20:20ORD-LHR
18h 55m1 stop
£399Icelandair
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Sat, 27 Sep - Thu, 2 Oct
Icelandair Logo
21:25 - 18:15LHR-ORD
26h 50m1 stop
Icelandair Logo
19:25 - 20:20ORD-LHR
18h 55m1 stop
£402Icelandair
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Tue, 23 Sep - Sun, 5 Oct

United Airlines flights from London Heathrow Airport to Chicago

Our best United Airlines deals on London Heathrow Airport to Chicago flight tickets
United Airlines
25 Sept
LHR11:05London Heathrow
31h 00m
1 stop
ORD12:05Chicago O'Hare Intl
27 Sept
ORD10:35Chicago O'Hare Intl
28h 25m
1 stop
LHR21:00London Heathrow
£348
Find similar
United Airlines
13 Sept
LHR06:50London Heathrow
11h 15m
1 stop
ORD12:05Chicago O'Hare Intl
13 Sept
ORD18:00Chicago O'Hare Intl
30h 30m
1 stop
LHR06:30London Heathrow
£398
Find similar
United Airlines
9 Aug
LHR11:05London Heathrow
9h 05m
ORD14:10Chicago O'Hare Intl
9 Aug
ORD20:25Chicago O'Hare Intl
31h 10m
1 stop
LHR09:35London Heathrow
£450
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
20 Nov
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
7 Dec
ORD19:20Chicago O'Hare Intl
17h 10m
1 stop
LHR18:30London Heathrow
£382
Find similar
Scandinavian Airlines
6 Nov
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
9 Nov
ORD19:20Chicago O'Hare Intl
16h 20m
1 stop
LHR17:40London Heathrow
£384
Find similar
Scandinavian Airlines
19 Nov
LHR10:20London Heathrow
12h 25m
1 stop
ORD16:45Chicago O'Hare Intl
26 Nov
ORD19:20Chicago O'Hare Intl
17h 10m
1 stop
LHR18:30London Heathrow
£386
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 1 August 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 23/9

09:30-19:55

1 stop16h 25m

Chicago O'Hare Intl

Tue 30/9

19:05-19:20

1 stop18h 15m

£340

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/9

11:05-12:05

1 stop31h 00m

Chicago O'Hare Intl

Sat 27/9

10:35-21:00

1 stop28h 25m

£348

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 17/9

09:30-19:55

1 stop16h 25m

Chicago O'Hare Intl

Sun 28/9

22:30-20:40

1 stop16h 10m

£362

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/9

10:30-19:55

1 stop15h 25m

Chicago O'Hare Intl

Mon 22/9

22:30-17:40

1 stop13h 10m

£366

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/9

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Wed 10/9

21:15-13:55

1 stop10h 40m

£367

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 18/9

08:50-14:00

1 stop11h 10m

Chicago O'Hare Intl

Sat 4/10

21:15-13:55

1 stop10h 40m

£368

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 20/11

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 7/12

19:20-18:30

1 stop17h 10m

£382

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 6/11

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 9/11

19:20-17:40

1 stop16h 20m

£384

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 27/9

21:25-21:15

1 stop29h 50m

Chicago O'Hare Intl

Thu 2/10

19:25-20:20

1 stop18h 55m

£399

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 23/9

21:25-18:15

1 stop26h 50m

Chicago O'Hare Intl

Sun 5/10

19:25-20:20

1 stop18h 55m

£402

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 £453, 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 £454.

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 £613. 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 Sunday, with ticket prices averaging around £678.

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 £508 when looking at flights departing in the evening. Flights in the afternoon are often more expensive, with an average ticket price of £677.

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 £557 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 £524 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?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Chicago.

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

As of August 2025, prices for London Heathrow Airport to Chicago flights are approximately 40% more expensive 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

£266

Fastest flight time

11h 10m

Direct flights

Every day

Airports in Chicago

2 airports
The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is £266. The best return flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is £340.
The fastest flight from London Heathrow Airport to Chicago takes 11h 10m
Direct flights go from London Heathrow Airport to Chicago every day.
There are 2 airports near Chicago: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)
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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 11h 10m 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 £349Free CancellationRating
7.0
520 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom £359Free CancellationRating
7.3
1,457 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £374Free CancellationRating
7.1
1,933 reviews
Search TAP AIR PORTUGAL flights
Virgin AtlanticPriceFrom £388Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
Brussels AirlinesPriceFrom £400Free CancellationRating
7.2
350 reviews
Search Brussels Airlines flights
LufthansaPriceFrom £403Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom £410Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
United AirlinesPriceFrom £414Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
British AirwaysPriceFrom £414Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
KLMPriceFrom £423Free CancellationRating
7.8
1,383 reviews
Search KLM 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 £542 round-trip, up to an average price of £783. Our users have rated Austrian Airlines at 7.6/10.

  • Finnair Flights From London Heathrow Airport to Chicago

    £594 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 £759, however, with flight time and availability significantly affecting the price. Finnair (7.6/10 from 1,316 user reviews) flies into Chicago from London Heathrow Airport 34 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