How many flights depart from London to Chicago on average per day?

40 flights are operational daily from London to Chicago as of September 2025. The most popular departure time for this route is 11:00, with 56% of flights per day taking off in the afternoon.

What is the cheapest airline that flies from London to Chicago?

TAP AIR PORTUGAL, WestJet, and JetBlue are the most popular carriers operating from London to Chicago

How many flights depart from London to Chicago on average per week?

As of September 2025, 285 flights take off from London and land in Chicago each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.

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.

€385 Cheap Flights from London to Chicago in 2025

1 adult

0 bags

Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London to Chicago

Round-trip

One-way

Last minute

Direct

Cheap return flights

10:25 - 13:45LHR-ORD

9h 20mdirect

21:05 - 11:15ORD-LHR

8h 10mdirect

€478United Airlines

Find Deal

Fri, 21 Nov - Sat, 29 Nov

08:30 - 11:30LHR-ORD

9h 00mdirect

21:25 - 11:45ORD-LHR

8h 20mdirect

€480United Airlines

Find Deal

Mon, 29 Sep - Sat, 11 Oct

06:30 - 14:10LHR-ORD

13h 40m1 stop

18:20 - 11:25ORD-LHR

11h 05m1 stop

€485Delta

Find Deal

Fri, 3 Oct - Fri, 10 Oct

11:00 - 13:50LHR-ORD

8h 50mdirect

16:05 - 09:15ORD-LHR

11h 10m1 stop

€487British Airways

Find Deal

Sat, 6 Dec - Sun, 7 Dec

06:30 - 17:30LHR-ORD

17h 00m2 stops

18:28 - 11:25ORD-LHR

10h 57m1 stop

€490Delta

Find Deal

Sat, 13 Sep - Sat, 27 Sep

09:15 - 11:50LHR-ORD

8h 35mdirect

20:40 - 10:30ORD-LHR

7h 50mdirect

€495British Airways

Find Deal

Fri, 19 Sep - Fri, 26 Sep

07:00 - 15:55LHR-ORD

14h 55m2 stops

19:05 - 16:35ORD-LHR

15h 30m2 stops

€497SWISS

Find Deal

Sat, 13 Sep - Fri, 19 Sep

07:05 - 16:45LHR-ORD

15h 40m2 stops

19:20 - 16:00ORD-LHR

14h 40m1 stop

€497Scandinavian Airlines

Find Deal

Fri, 5 Dec - Fri, 26 Dec

06:40 - 16:45LHR-ORD

16h 05m2 stops

19:20 - 18:30ORD-LHR

17h 10m1 stop

€509Scandinavian Airlines

Find Deal

Sun, 14 Dec - Sat, 27 Dec

20:05 - 15:55LHR-ORD

25h 50m1 stop

19:05 - 16:35ORD-LHR

15h 30m2 stops

€523SWISS

Find Deal

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

€478

Find similar

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

€480

Find similar

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

€481

Find similar

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

€485

Find similar

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

€486

Find similar

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

€488

Find similar

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

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

Prices

Airlines

Other information

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)

Search flight deals

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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London to Chicago is Boeing 767-300 (45.97% of total bookings). The next most popular plane models are Boeing 777 (12.87%), Boeing 787-10 Dreamliner (11.81%), and Boeing 787-9 Dreamliner (7.30%).

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.