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

JetBlue, Finnair, and Austrian Airlines are the most popular carriers operating from London to Chicago

What is the most punctual flight time for London to Chicago flights?

Generally, flights departing at night tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 172 minutes.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

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

41 flights are operational daily from London to Chicago as of December 2025. The most popular departure time for this route is 12:00, with 63% of flights per day taking off in the afternoon.

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

As of December 2025, 289 flights take off from London and land in Chicago each week. The most common flight departure day for this route is Sat, with 15% of weekly flights taking off on this day.

Which airline has the best punctuality record on London to Chicago flights?

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

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.

€381 Cheap Flights from London to Chicago in 2025/26

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

Enter your travel dates to find the best prices.

21:05 - 16:45

LHR

ORD

25h 40m2 stops

19:20 - 08:55

ORD

LHR

31h 35m2 stops

€472Scandinavian Airlines

Fri, 13 Feb - Fri, 20 Feb

17:30 - 16:45

LHR

ORD

29h 15m2 stops

19:10 - 16:00

ORD

LHR

14h 50m1 stop

€474Scandinavian Airlines

Tue, 10 Feb - Sun, 22 Feb

13:25 - 19:00

LHR

ORD

11h 35m1 stop

20:35 - 10:30

ORD

LHR

7h 55mdirect

€475British Airways

Thu, 7 May - Sun, 17 May

17:25 - 15:10

LHR

ORD

27h 45m2 stops

11:45 - 08:15

ORD

LHR

14h 30m1 stop

€477British Airways

Wed, 11 Feb - Sat, 21 Feb

09:00 - 16:20

LHR

ORD

13h 20m1 stop

16:45 - 05:55

ORD

LHR

8h 10mdirect

€478United Airlines

Wed, 4 Mar - Wed, 25 Mar

20:05 - 12:45

LHR

ORD

22h 40m1 stop

18:50 - 16:20

ORD

LHR

15h 30m1 stop

€479SWISS

Thu, 8 Jan - Wed, 21 Jan

10:20 - 16:45

LHR

ORD

12h 25m1 stop

19:20 - 18:50

ORD

LHR

17h 30m2 stops

€480Scandinavian Airlines

Mon, 16 Feb - Mon, 23 Feb

06:40 - 16:45

LHR

ORD

16h 05m2 stops

19:20 - 18:50

ORD

LHR

17h 30m2 stops

€483Scandinavian Airlines

Sat, 7 Feb - Sat, 14 Feb

06:40 - 16:45

LHR

ORD

16h 05m2 stops

19:20 - 18:50

ORD

LHR

17h 30m2 stops

€483Scandinavian Airlines

Sat, 7 Feb - Sat, 14 Feb

06:40 - 16:45

LHR

ORD

16h 05m2 stops

19:20 - 18:50

ORD

LHR

17h 30m2 stops

€486Scandinavian Airlines

Mon, 16 Feb - Mon, 23 Feb

Delta flights from London to Chicago

Our best Delta deals on London to Chicago flight tickets

Delta

11 Feb

LHR06:30London Heathrow

13h 50m

1 stop

ORD14:20Chicago O'Hare Intl

21 Feb

ORD12:29Chicago O'Hare Intl

12h 36m

1 stop

LHR07:05London Heathrow

€500

Find similar

Delta

14 Jan

LHR11:45London Heathrow

15h 20m

2 stops

ORD21:05Chicago O'Hare Intl

21 Jan

ORD13:57Chicago O'Hare Intl

10h 58m

1 stop

LHR06:55London Heathrow

€501

Find similar

Delta

19 Jan

LHR06:30London Heathrow

13h 50m

1 stop

ORD14:20Chicago O'Hare Intl

26 Jan

ORD13:58Chicago O'Hare Intl

14h 32m

2 stops

LHR10:30London Heathrow

€510

Find similar

TAP AIR PORTUGAL flights from London to Chicago

Our best TAP AIR PORTUGAL deals on London to Chicago flight tickets

TAP AIR PORTUGAL

31 Mar

LHR19:50London Heathrow

26h 10m

1 stop

ORD16:00Chicago O'Hare Intl

12 Apr

ORD18:00Chicago O'Hare Intl

22h 00m

1 stop

LHR22:00London Heathrow

€509

Find similar

TAP AIR PORTUGAL

8 Jan

LHR16:30London Heathrow

28h 55m

1 stop

ORD15:25Chicago O'Hare Intl

21 Jan

ORD16:15Chicago O'Hare Intl

23h 20m

3 stops

LHR21:35London Heathrow

€1,080

Find similar

TAP AIR PORTUGAL

31 Dec

LHR06:00London Heathrow

15h 00m

1 stop

ORD15:00Chicago O'Hare Intl

4 Jan

ORD20:25Chicago O'Hare Intl

34h 15m

1 stop

LHR12:40London Heathrow

€1,237

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/2

21:05-16:45

2 stops25h 40m

Chicago O'Hare Intl

Fri 20/2

19:20-08:55

2 stops31h 35m

€472

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/2

17:30-16:45

2 stops29h 15m

Chicago O'Hare Intl

Sun 22/2

19:10-16:00

1 stop14h 50m

€474

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 7/5

13:25-19:00

1 stop11h 35m

Chicago O'Hare Intl

Sun 17/5

20:35-10:30

Nonstop7h 55m

€475

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 11/2

17:25-15:10

2 stops27h 45m

Chicago O'Hare Intl

Sat 21/2

11:45-08:15

1 stop14h 30m

€477

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Wed 25/3

16:45-05:55

Nonstop8h 10m

€478

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/1

20:05-12:45

1 stop22h 40m

Chicago O'Hare Intl

Wed 21/1

18:50-16:20

1 stop15h 30m

€479

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 16/2

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Mon 23/2

19:20-18:50

2 stops17h 30m

€480

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Sat 14/2

19:20-18:50

2 stops17h 30m

€483

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Sat 14/2

19:20-18:50

2 stops17h 30m

€483

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 16/2

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Mon 23/2

19:20-18:50

2 stops17h 30m

€486

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

Delays

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 €489, 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 September to fly from London, when ticket prices are also cheap, with an average price of €494.

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 €659. 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 €3,179.

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 €617 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 €591 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 December 2025, prices for London to Chicago flights are approximately 3% 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	9h 20m
Direct flights	Every day
Airports in Chicago	3 airports

The fastest flight from London to Chicago takes 9h 20m

Direct flights go from London to Chicago every day.

There are 3 airports in Chicago. From London there are direct flights to 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 9h 20m.
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 (31.76% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (22.21%), Boeing 777 (11.73%), and Boeing 787-10 Dreamliner (10.31%).

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.

An easier way to manage your Chicago trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Wed 28/1

Wed 4/2

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Chicago Midway Airport

Chicago O'Hare Intl Airport

Popular Cities in the United States

Flights to New Yorkfrom €286

Flights to Orlandofrom €378

Flights to Miamifrom €367

Flights to Los Angelesfrom €360

Flights to Bostonfrom €280

Flights to San Franciscofrom €415

Flights to Las Vegasfrom €386

Flights to Anchoragefrom €1,290

Flights to Washington, D.C.from €360

Flights to Denverfrom €341

Flights to Dallasfrom €442

Flights to Houstonfrom €487

Cheap flights from London to Chicago from €442

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 to Chicago departing on 27/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to Chicago

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Delta flights from London to Chicago

Our best Delta deals on London to Chicago flight tickets

TAP AIR PORTUGAL flights from London to Chicago

Our best TAP AIR PORTUGAL deals on London to Chicago flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London to Chicago that are best for you.

See travel insights to Chicago from

How to get the cheapest flight ticket from London to Chicago

What is the cheapest month to fly to Chicago?

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

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?

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 December 2025, prices for London to Chicago flights are approximately 3% more expensive when compared to flights at the same time last year.

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

JetBlue, Finnair, and Austrian Airlines are the most popular carriers operating from London to Chicago

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 172 minutes.

What is the most punctual flight time for London to Chicago flights?

Generally, flights departing at night tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on London to Chicago flights?

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

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

41 flights are operational daily from London to Chicago as of December 2025. The most popular departure time for this route is 12:00, with 63% of flights per day taking off in the afternoon.

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

As of December 2025, 289 flights take off from London and land in Chicago each week. The most common flight departure day for this route is Sat, with 15% of weekly flights taking off on this day.

When to book flights from London to Chicago

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

Direct flights

Airports in Chicago

How far is London to Chicago by plane?

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

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

What documentation or ID do you need to fly to Chicago?

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?

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

How can momondo help me find flights 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?

An easier way to manage your Chicago trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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