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 168 minutes.

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

British Airways, SWISS, and United Airlines are the most popular carriers operating from London Heathrow to Chicago

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 Heathrow Airport to Chicago on average per week?

As of November 2025, there are 228 flights per week flying from London Heathrow Airport to Chicago. The most common day of the week flights depart is Mon, with 18% of flights taking off on this day.

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.

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

As of November 2025, there are 32 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 67% of flights taking off in the afternoon.

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

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

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 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.

€389 Cheap Flights from London Heathrow Airport to Chicago in 2025/26

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10:20 - 16:45LHR-ORD

12h 25m1 stop

19:10 - 16:00ORD-LHR

14h 50m1 stop

€486Scandinavian Airlines

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Mon, 12 Jan - Sun, 18 Jan

10:20 - 16:45LHR-ORD

12h 25m1 stop

19:10 - 18:50ORD-LHR

17h 40m2 stops

€489Scandinavian Airlines

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Mon, 12 Jan - Sun, 18 Jan

06:40 - 16:45LHR-ORD

16h 05m1 stop

19:20 - 09:20ORD-LHR

32h 00m1 stop

€502Scandinavian Airlines

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Thu, 25 Dec - Fri, 16 Jan

10:20 - 16:45LHR-ORD

12h 25m1 stop

19:20 - 16:00ORD-LHR

14h 40m1 stop

€503Scandinavian Airlines

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Mon, 12 Jan - Fri, 16 Jan

07:50 - 19:15LHR-ORD

17h 25m1 stop

18:35 - 08:15ORD-LHR

7h 40mdirect

€509British Airways

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Sat, 7 Feb - Sat, 14 Feb

12:15 - 17:20LHR-ORD

11h 05m1 stop

18:30 - 19:30ORD-LHR

19h 00m1 stop

€510Icelandair

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Wed, 10 Dec - Tue, 16 Dec

20:35 - 17:20LHR-ORD

26h 45m1 stop

18:30 - 10:50ORD-LHR

10h 20m1 stop

€511Icelandair

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Mon, 15 Dec - Thu, 22 Jan

18:30 - 14:45LHR-ORD

26h 15m1 stop

19:10 - 15:30ORD-LHR

14h 20m1 stop

€513TAP AIR PORTUGAL

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Sat, 6 Dec - Wed, 10 Dec

12:50 - 19:15LHR-ORD

12h 25m1 stop

18:25 - 08:15ORD-LHR

7h 50mdirect

€514British Airways

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Wed, 4 Feb - Sun, 8 Feb

15:35 - 16:55LHR-ORD

31h 20m2 stops

19:10 - 16:25ORD-LHR

15h 15m2 stops

€515Scandinavian Airlines

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Sat, 7 Feb - Sun, 15 Feb

British Airways flights from London Heathrow Airport to Chicago

Our best British Airways deals on London Heathrow Airport to Chicago flight tickets

British Airways

7 Feb

LHR07:50London Heathrow

17h 25m

1 stop

ORD19:15Chicago O'Hare Intl

14 Feb

ORD18:35Chicago O'Hare Intl

7h 40m

LHR08:15London Heathrow

€509

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British Airways

4 Feb

LHR12:50London Heathrow

12h 25m

1 stop

ORD19:15Chicago O'Hare Intl

8 Feb

ORD18:25Chicago O'Hare Intl

7h 50m

LHR08:15London Heathrow

€514

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British Airways

29 Apr

LHR08:50London Heathrow

11h 10m

1 stop

ORD14:00Chicago O'Hare Intl

21 May

ORD20:30Chicago O'Hare Intl

8h 00m

LHR10:30London Heathrow

€528

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Icelandair flights from London Heathrow Airport to Chicago

Our best Icelandair deals on London Heathrow Airport to Chicago flight tickets

Icelandair

10 Dec

LHR12:15London Heathrow

11h 05m

1 stop

ORD17:20Chicago O'Hare Intl

16 Dec

ORD18:30Chicago O'Hare Intl

19h 00m

1 stop

LHR19:30London Heathrow

€510

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Icelandair

15 Dec

LHR20:35London Heathrow

26h 45m

1 stop

ORD17:20Chicago O'Hare Intl

22 Jan

ORD18:30Chicago O'Hare Intl

10h 20m

1 stop

LHR10:50London Heathrow

€511

Find similar

Icelandair

12 Dec

LHR12:15London Heathrow

11h 05m

1 stop

ORD17:20Chicago O'Hare Intl

7 Jan

ORD18:30Chicago O'Hare Intl

19h 00m

1 stop

LHR19:30London Heathrow

€532

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momondo Fare Finder

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LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 12/1

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sun 18/1

19:10-16:00

1 stop14h 50m

€486

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 12/1

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sun 18/1

19:10-18:50

2 stops17h 40m

€489

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Fri 16/1

19:20-09:20

1 stop32h 00m

€502

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 12/1

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Fri 16/1

19:20-16:00

1 stop14h 40m

€503

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

07:50-19:15

1 stop17h 25m

Chicago O'Hare Intl

Sat 14/2

18:35-08:15

Nonstop7h 40m

€509

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/12

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Tue 16/12

18:30-19:30

1 stop19h 00m

€510

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 15/12

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Thu 22/1

18:30-10:50

1 stop10h 20m

€511

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

18:30-14:45

1 stop26h 15m

Chicago O'Hare Intl

Wed 10/12

19:10-15:30

1 stop14h 20m

€513

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/2

12:50-19:15

1 stop12h 25m

Chicago O'Hare Intl

Sun 8/2

18:25-08:15

Nonstop7h 50m

€514

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

15:35-16:55

2 stops31h 20m

Chicago O'Hare Intl

Sun 15/2

19:10-16:25

2 stops15h 15m

€515

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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

Prices

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Delays

Other information

What is the cheapest month to fly to Chicago?

The cheapest month to fly to Chicago from London Heathrow Airport is in February. Flight prices, which tend to average around €519, 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 Heathrow Airport, 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 Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as €672. 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 €3,241.

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 €635 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 €604 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.

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 50m
Direct flights	Every day
Airports in Chicago	1 airport

The fastest flight from London Heathrow Airport to Chicago takes 8h 50m

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. 9h 00m is a normal flight duration for this route.
When did momondo last update prices for flights from London Heathrow Airport to Chicago?
Prices for flights from London Heathrow Airport to Chicago were last updated today.
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 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 Heathrow Airport to Chicago?
Based on momondo bookings for flights between London Heathrow Airport and Chicago, the leading plane model is Boeing 767-300, making up 40.86% of the total bookings. Other popular models include Boeing 777 with 14.21%, Boeing 787-10 Dreamliner with 14.21%, and Boeing 787-9 Dreamliner with 8.84%.

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?

momondo does allow users to show only those flights to Chicago from London which offer a flexible booking policy as well as other useful filters and features.

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?

If you are not ready to book a flight from London to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.

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Find better results for your trip to the United States

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Cheap flights from London Heathrow Airport to Chicago from €464

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British Airways flights from London Heathrow Airport to Chicago

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

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?

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

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?

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.

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.

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

British Airways, SWISS, and United Airlines are the most popular carriers operating from London Heathrow 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 168 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 Heathrow Airport to Chicago on average per day?

As of November 2025, there are 32 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 67% of flights taking off in the afternoon.

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

As of November 2025, there are 228 flights per week flying from London Heathrow Airport to Chicago. The most common day of the week flights depart is Mon, with 18% of flights taking off on this day.

When to book flights from London Heathrow Airport to Chicago

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

Direct flights

Airports in Chicago

How far is London Heathrow to Chicago by plane?

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

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

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

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?

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