Cheap flights from London to Chicago from €478

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to Chicago departing on 21/11. 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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0 bags
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Cheap return flights

United Airlines Logo
10:25 - 13:45LHR-ORD
9h 20mdirect
United Airlines Logo
21:05 - 11:15ORD-LHR
8h 10mdirect
€478United Airlines
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Fri, 21 Nov - Sat, 29 Nov
United Airlines Logo
08:30 - 11:30LHR-ORD
9h 00mdirect
United Airlines Logo
21:25 - 11:45ORD-LHR
8h 20mdirect
€480United Airlines
Find Deal
Mon, 29 Sep - Sat, 11 Oct
Delta Logo
06:30 - 14:10LHR-ORD
13h 40m1 stop
Delta Logo
18:20 - 11:25ORD-LHR
11h 05m1 stop
€485Delta
Find Deal
Fri, 3 Oct - Fri, 10 Oct
British Airways Logo
11:00 - 13:50LHR-ORD
8h 50mdirect
British Airways Logo
16:05 - 09:15ORD-LHR
11h 10m1 stop
€487British Airways
Find Deal
Sat, 6 Dec - Sun, 7 Dec
Delta Logo
06:30 - 17:30LHR-ORD
17h 00m2 stops
Delta Logo
18:28 - 11:25ORD-LHR
10h 57m1 stop
€490Delta
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Sat, 13 Sep - Sat, 27 Sep
British Airways Logo
09:15 - 11:50LHR-ORD
8h 35mdirect
British Airways Logo
20:40 - 10:30ORD-LHR
7h 50mdirect
€495British Airways
Find Deal
Fri, 19 Sep - Fri, 26 Sep
SWISS Logo
07:00 - 15:55LHR-ORD
14h 55m2 stops
SWISS Logo
19:05 - 16:35ORD-LHR
15h 30m2 stops
€497SWISS
Find Deal
Sat, 13 Sep - Fri, 19 Sep
Scandinavian Airlines Logo
07:05 - 16:45LHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
19:20 - 16:00ORD-LHR
14h 40m1 stop
€497Scandinavian Airlines
Find Deal
Fri, 5 Dec - Fri, 26 Dec
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m2 stops
Scandinavian Airlines Logo
19:20 - 18:30ORD-LHR
17h 10m1 stop
€509Scandinavian Airlines
Find Deal
Sun, 14 Dec - Sat, 27 Dec
SWISS Logo
20:05 - 15:55LHR-ORD
25h 50m1 stop
SWISS Logo
19:05 - 16:35ORD-LHR
15h 30m2 stops
€523SWISS
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Wed, 17 Sep - Thu, 25 Sep

United Airlines flights from London to Chicago

Our best United Airlines deals on London to Chicago flight tickets
United Airlines
21 Nov
LHR10:25London Heathrow
9h 20m
ORD13:45Chicago O'Hare Intl
29 Nov
ORD21:05Chicago O'Hare Intl
8h 10m
LHR11:15London Heathrow
United Airlines
29 Sept
LHR08:30London Heathrow
9h 00m
ORD11:30Chicago O'Hare Intl
11 Oct
ORD21:25Chicago O'Hare Intl
8h 20m
LHR11:45London Heathrow
United Airlines
3 Oct
LHR14:10London Heathrow
9h 10m
ORD17:20Chicago O'Hare Intl
5 Oct
ORD18:00Chicago O'Hare Intl
8h 20m
LHR08:20London Heathrow

Delta flights from London to Chicago

Our best Delta deals on London to Chicago flight tickets
Delta
3 Oct
LHR06:30London Heathrow
13h 40m
1 stop
ORD14:10Chicago O'Hare Intl
10 Oct
ORD18:20Chicago O'Hare Intl
11h 05m
1 stop
LHR11:25London Heathrow
Delta
13 Sept
LHR06:30London Heathrow
17h 00m
2 stops
ORD17:30Chicago O'Hare Intl
30 Sept
ORD17:00Chicago O'Hare Intl
9h 55m
1 stop
LHR08:55London Heathrow
Delta
8 Sept
LHR08:40London Heathrow
12h 00m
1 stop
ORD14:40Chicago O'Hare Intl
19 Sept
ORD13:00Chicago O'Hare Intl
11h 25m
1 stop
LHR06:25London Heathrow

momondo Fare Finder

 
Customise your flight search to find flights from London 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 3 September 2025.
Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 21/11

10:25-13:45

Nonstop9h 20m

Chicago O'Hare Intl

Sat 29/11

21:05-11:15

Nonstop8h 10m

€478

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 29/9

08:30-11:30

Nonstop9h 00m

Chicago O'Hare Intl

Sat 11/10

21:25-11:45

Nonstop8h 20m

€480

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/10

06:30-14:10

1 stop13h 40m

Chicago O'Hare Intl

Fri 10/10

18:20-11:25

1 stop11h 05m

€485

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

11:00-13:50

Nonstop8h 50m

Chicago O'Hare Intl

Sun 7/12

16:05-09:15

1 stop11h 10m

€487

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 13/9

06:30-17:30

2 stops17h 00m

Chicago O'Hare Intl

Sat 27/9

18:28-11:25

1 stop10h 57m

€490

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 19/9

09:15-11:50

Nonstop8h 35m

Chicago O'Hare Intl

Fri 26/9

20:40-10:30

Nonstop7h 50m

€495

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 13/9

07:00-15:55

2 stops14h 55m

Chicago O'Hare Intl

Fri 19/9

19:05-16:35

2 stops15h 30m

€497

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 5/12

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Fri 26/12

19:20-16:00

1 stop14h 40m

€497

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 14/12

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Sat 27/12

19:20-18:30

1 stop17h 10m

€509

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 17/9

20:05-15:55

1 stop25h 50m

Chicago O'Hare Intl

Thu 25/9

19:05-16:35

2 stops15h 30m

€523

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 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 is in February. Flight prices, which tend to average around €497, 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, when ticket prices are also cheap, with an average price of €520.

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

On average, the least expensive day to fly to Chicago from London is on a Thursday. momondo users have found tickets for Thursday departures for as low as €574. 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 €3,209.

What is the cheapest London to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €626 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 for as low as €599 on momondo.

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

There are 2 cabin classes available to choose from on London 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 to Chicago flight prices changed over time?

As of September 2025, prices for London to Chicago flights are approximately 39% more expensive when compared to flights at the same time last year.

When to book flights from London to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from London to Chicago according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Chicago (LON to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago

Fastest flight time

8h 25m

Direct flights

Every day

Airports in Chicago

1 airport
The fastest flight from London to Chicago takes 8h 25m
Direct flights go from London to Chicago every day.
There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)
  • How far is London to Chicago by plane?

    A flight from London to Chicago will travel around 6349.2 km. By plane, this route typically takes 8h 35m.

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London 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 to Chicago?

Why use momondo?

Why should I use momondo to find a flight deal from London to Chicago?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Chicago for you.

Can I find flights from London to Chicago with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Chicago flights to just show those with flexible booking policies.

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?

Of course. momondo tracks the price of London to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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1 adult
Mon 8/9
Mon 15/9

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