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Cheap flights from London Heathrow Airport to Chicago from $797

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
$797United Airlines
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Tue, 28 Oct - Wed, 12 Nov
United Airlines Logo
06:35 - 15:10LHR-ORD
13h 35m1 stop
United Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
$799United Airlines
Find Deal
Tue, 28 Oct - Tue, 4 Nov
United Airlines Logo
11:10 - 18:25LHR-ORD
13h 15m1 stop
United Airlines Logo
18:50 - 07:55ORD-LHR
8h 05mdirect
$800United Airlines
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Wed, 4 Mar - Tue, 10 Mar
United Airlines Logo
08:30 - 16:20LHR-ORD
12h 50m1 stop
United Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
$802United Airlines
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Sat, 1 Nov - Fri, 14 Nov
Scandinavian Airlines Logo
19:30 - 16:45LHR-ORD
27h 15m1 stop
Scandinavian Airlines Logo
19:10 - 16:00ORD-LHR
14h 50m1 stop
$803Scandinavian 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
$818Scandinavian Airlines
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Thu, 25 Dec - Wed, 31 Dec
British Airways Logo
09:50 - 15:45LHR-ORD
11h 55m1 stop
British Airways Logo
20:40 - 10:30ORD-LHR
7h 50mdirect
$838British Airways
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Fri, 3 Oct - Tue, 7 Oct
British Airways Logo
09:15 - 15:57LHR-ORD
12h 42m1 stop
British Airways Logo
22:15 - 14:55ORD-LHR
10h 40m1 stop
$848British Airways
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Mon, 29 Sep - Sun, 5 Oct
Multiple Airlines Logo
07:40 - 14:10LHR-ORD
12h 30m1 stop
Multiple Airlines Logo
17:50 - 07:55ORD-LHR
8h 05mdirect
$850Multiple 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
21:05 - 11:15ORD-LHR
8h 10mdirect
$853Austrian Airlines
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Tue, 2 Dec - Thu, 15 Jan

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
$803
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
$818
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
$820
Find similar

Delta flights from London Heathrow Airport to Chicago

Our best Delta deals on London Heathrow Airport to Chicago flight tickets
Delta
9 Oct
LHR06:30London Heathrow
14h 30m
2 stops
ORD15:00Chicago O'Hare Intl
15 Oct
ORD10:25Chicago O'Hare Intl
15h 40m
1 stop
LHR08:05London Heathrow
$860
Find similar
Delta
25 Sept
LHR08:40London Heathrow
15h 24m
2 stops
ORD18:04Chicago O'Hare Intl
11 Oct
ORD16:56Chicago O'Hare Intl
9h 59m
1 stop
LHR08:55London Heathrow
$863
Find similar
Delta
3 Mar
LHR11:45London Heathrow
14h 53m
2 stops
ORD20:38Chicago O'Hare Intl
10 Mar
ORD17:45Chicago O'Hare Intl
10h 00m
1 stop
LHR08:45London Heathrow
$872
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 78,305 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

$797

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 28/10

06:35-15:10

1 stop13h 35m

Chicago O'Hare Intl

Tue 4/11

17:50-07:55

Nonstop8h 05m

$799

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

$800

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 1/11

08:30-16:20

1 stop12h 50m

Chicago O'Hare Intl

Fri 14/11

17:50-07:55

Nonstop8h 05m

$802

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

$803

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

$818

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

$838

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 29/9

09:15-15:57

1 stop12h 42m

Chicago O'Hare Intl

Sun 5/10

22:15-14:55

1 stop10h 40m

$848

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

$850

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 2/12

12:05-18:30

1 stop12h 25m

Chicago O'Hare Intl

Thu 15/1

21:05-11:15

Nonstop8h 10m

$853

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?

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 $902.

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

Our data shows that Wednesday is the least expensive day to fly to Chicago. Tickets to fly out on this day can be as low as $1,115. Flights from London Heathrow Airport to Chicago on a Thursday will generally be more expensive and average around $2,752. 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 at midday. Our users have found flights to Chicago at midday for as low as $1,000. Flights in the morning are often more expensive, with an average ticket price of $1,162.

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 $1,085 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 $1,039 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 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. Flights usually cover this in 8h 50m, 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