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Cheap flights from London Heathrow Airport to Chicago from $817

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 29/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m2 stops
Scandinavian Airlines Logo
19:20 - 18:50ORD-LHR
17h 30m2 stops
$826Scandinavian Airlines
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Thu, 4 Dec - Wed, 14 Jan
Scandinavian Airlines Logo
21:05 - 16:45LHR-ORD
25h 40m2 stops
Scandinavian Airlines Logo
19:20 - 18:50ORD-LHR
17h 30m2 stops
$828Scandinavian Airlines
Find Deal
Thu, 4 Dec - Sun, 7 Dec
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
Scandinavian Airlines Logo
19:20 - 16:00ORD-LHR
14h 40m1 stop
$829Scandinavian Airlines
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Thu, 20 Nov - Sun, 23 Nov
Scandinavian Airlines Logo
17:30 - 16:55LHR-ORD
29h 25m2 stops
Scandinavian Airlines Logo
19:20 - 19:55ORD-LHR
18h 35m2 stops
$831Scandinavian Airlines
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Sat, 7 Feb - Sat, 14 Feb
Scandinavian Airlines Logo
07:05 - 16:45LHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
19:20 - 19:55ORD-LHR
18h 35m2 stops
$833Scandinavian Airlines
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Thu, 19 Feb - Thu, 26 Feb
TAP AIR PORTUGAL Logo
19:50 - 16:15LHR-ORD
26h 25m1 stop
TAP AIR PORTUGAL Logo
18:00 - 22:00ORD-LHR
22h 00m1 stop
$834TAP AIR PORTUGAL
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Fri, 1 May - Sun, 10 May
Icelandair Logo
12:15 - 17:20LHR-ORD
11h 05m1 stop
Icelandair Logo
19:25 - 11:55ORD-LHR
10h 30m1 stop
$903Icelandair
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Wed, 21 Jan - Thu, 16 Apr
Icelandair Logo
20:35 - 17:20LHR-ORD
26h 45m1 stop
Icelandair Logo
18:30 - 19:30ORD-LHR
19h 00m1 stop
$906Icelandair
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Tue, 2 Dec - Tue, 3 Feb
United Airlines Logo
18:00 - 09:13LHR-ORD
21h 13m1 stop
United Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
$914United Airlines
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Sat, 6 Dec - Sun, 7 Dec
United Airlines Logo
18:00 - 19:30LHR-ORD
31h 30m1 stop
United Airlines Logo
15:45 - 05:55ORD-LHR
8h 10mdirect
$926United Airlines
Find Deal
Sat, 17 Jan - Mon, 19 Jan

Icelandair flights from London Heathrow Airport to Chicago

Our best Icelandair deals on London Heathrow Airport to Chicago flight tickets
Icelandair
21 Jan
LHR12:15London Heathrow
11h 05m
1 stop
ORD17:20Chicago O'Hare Intl
16 Apr
ORD19:25Chicago O'Hare Intl
10h 30m
1 stop
LHR11:55London Heathrow
$903
Find similar
Icelandair
2 Dec
LHR20:35London Heathrow
26h 45m
1 stop
ORD17:20Chicago O'Hare Intl
2 Feb
ORD18:30Chicago O'Hare Intl
10h 20m
1 stop
LHR10:50London Heathrow
$906
Find similar
Icelandair
19 Nov
LHR12:15London Heathrow
11h 05m
1 stop
ORD17:20Chicago O'Hare Intl
24 Nov
ORD18:30Chicago O'Hare Intl
10h 20m
1 stop
LHR10:50London Heathrow
$908
Find similar

United Airlines flights from London Heathrow Airport to Chicago

Our best United Airlines deals on London Heathrow Airport to Chicago flight tickets
United Airlines
6 Dec
LHR18:00London Heathrow
21h 13m
1 stop
ORD09:13Chicago O'Hare Intl
7 Dec
ORD17:50Chicago O'Hare Intl
8h 05m
LHR07:55London Heathrow
$914
Find similar
United Airlines
17 Jan
LHR18:00London Heathrow
31h 30m
1 stop
ORD19:30Chicago O'Hare Intl
19 Jan
ORD15:45Chicago O'Hare Intl
8h 10m
LHR05:55London Heathrow
$926
Find similar
United Airlines
15 Nov
LHR08:00London Heathrow
12h 40m
1 stop
ORD14:40Chicago O'Hare Intl
15 Nov
ORD17:55Chicago O'Hare Intl
31h 15m
1 stop
LHR07:10London Heathrow
$1,045
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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 78,305 searches. Data last updated 7 November 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 4/12

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Wed 14/1

19:20-18:50

2 stops17h 30m

$826

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/12

21:05-16:45

2 stops25h 40m

Chicago O'Hare Intl

Sun 7/12

19:20-18:50

2 stops17h 30m

$828

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 20/11

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 23/11

19:20-16:00

1 stop14h 40m

$829

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

17:30-16:55

2 stops29h 25m

Chicago O'Hare Intl

Sat 14/2

19:20-19:55

2 stops18h 35m

$831

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 19/2

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Thu 26/2

19:20-19:55

2 stops18h 35m

$833

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 1/5

19:50-16:15

1 stop26h 25m

Chicago O'Hare Intl

Sun 10/5

18:00-22:00

1 stop22h 00m

$834

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 21/1

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Thu 16/4

19:25-11:55

1 stop10h 30m

$903

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 2/12

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Tue 3/2

18:30-19:30

1 stop19h 00m

$906

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

18:00-09:13

1 stop21h 13m

Chicago O'Hare Intl

Sun 7/12

17:50-07:55

Nonstop8h 05m

$914

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 17/1

18:00-19:30

1 stop31h 30m

Chicago O'Hare Intl

Mon 19/1

15:45-05:55

Nonstop8h 10m

$926

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?

If you don’t want to visit Chicago in February, then you should wait until September to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $923.

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

Our data shows that Friday is the least expensive day to fly to Chicago. Tickets to fly out on this day can be as low as $909. Flights from London Heathrow Airport to Chicago on a Saturday will generally be more expensive and average around $2,698. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest London Heathrow Airport to Chicago flights are usually those with departure times in the morning. Our users have found flights to Chicago in the morning for as low as $1,211. Flights at midday are often more expensive, with an average ticket price of $1,235.

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 $1,127 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 $1,066 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.

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

You could potentially save up to 39% 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 November 2025, prices for London Heathrow Airport to Chicago flights are approximately 1% 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. Flights usually cover this in 11h 05m, depending on flying conditions and air traffic around both airports.

  • 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 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 required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable 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?

All flight searches from London to Chicago on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Chicago.

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

Price alerts on flights to Chicago from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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