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

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

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

As of December 2025, there are 250 flights per week flying from London Heathrow Airport to Chicago. The most common day of the week flights depart is Sat, with 18% of 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.

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 Heathrow Airport to Chicago on average per day?

As of December 2025, there are 35 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 68% 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.

€383 Cheap Flights from London Heathrow Airport to Chicago in 2025/26

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12:15 - 18:20

LHR

ORD

11h 05m1 stop

19:25 - 11:55

ORD

LHR

10h 30m1 stop

€518Icelandair

Tue, 17 Mar - Thu, 30 Apr

20:35 - 18:20

LHR

ORD

26h 45m1 stop

19:25 - 11:55

ORD

LHR

10h 30m1 stop

€519Icelandair

Sun, 15 Mar - Mon, 4 May

06:40 - 16:45

LHR

ORD

16h 05m1 stop

19:15 - 09:20

ORD

LHR

32h 05m1 stop

€521Scandinavian Airlines

Thu, 25 Dec - Sat, 18 Apr

06:40 - 17:45

LHR

ORD

40h 05m2 stops

19:15 - 16:00

ORD

LHR

14h 45m1 stop

€523Scandinavian Airlines

Sun, 15 Mar - Wed, 29 Apr

06:40 - 16:45

LHR

ORD

16h 05m1 stop

19:15 - 21:35

ORD

LHR

20h 20m2 stops

€524Scandinavian Airlines

Thu, 25 Dec - Mon, 20 Apr

12:15 - 17:20

LHR

ORD

11h 05m1 stop

19:25 - 10:55

ORD

LHR

10h 30m1 stop

€526Icelandair

Wed, 25 Feb - Sat, 28 Mar

07:05 - 17:45

LHR

ORD

15h 40m2 stops

19:15 - 16:25

ORD

LHR

15h 10m2 stops

€527Scandinavian Airlines

Thu, 19 Mar - Wed, 29 Apr

10:20 - 16:45

LHR

ORD

12h 25m1 stop

10:40 - 09:20

ORD

LHR

17h 40m2 stops

€530Scandinavian Airlines

Wed, 4 Mar - Tue, 10 Mar

13:05 - 18:15

LHR

ORD

11h 10m1 stop

19:25 - 11:55

ORD

LHR

10h 30m1 stop

€532Icelandair

Tue, 14 Apr - Thu, 14 May

21:25 - 18:15

LHR

ORD

26h 50m1 stop

19:25 - 20:20

ORD

LHR

18h 55m1 stop

€533Icelandair

Sun, 12 Apr - Thu, 14 May

Icelandair flights from London Heathrow Airport to Chicago

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

Icelandair

17 Mar

LHR12:15London Heathrow

11h 05m

1 stop

ORD18:20Chicago O'Hare Intl

4 May

ORD19:25Chicago O'Hare Intl

18h 55m

1 stop

LHR20:20London Heathrow

€518

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Icelandair

15 Mar

LHR20:35London Heathrow

26h 45m

1 stop

ORD18:20Chicago O'Hare Intl

4 May

ORD19:25Chicago O'Hare Intl

10h 30m

1 stop

LHR11:55London Heathrow

€519

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Icelandair

25 Feb

LHR12:15London Heathrow

11h 05m

1 stop

ORD17:20Chicago O'Hare Intl

28 Mar

ORD19:25Chicago O'Hare Intl

10h 30m

1 stop

LHR10:55London Heathrow

€526

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Scandinavian Airlines flights from London Heathrow Airport to Chicago

Our best Scandinavian Airlines deals on London Heathrow Airport to Chicago flight tickets

Scandinavian Airlines

25 Dec

LHR06:40London Heathrow

16h 05m

1 stop

ORD16:45Chicago O'Hare Intl

18 Apr

ORD19:15Chicago O'Hare Intl

32h 05m

1 stop

LHR09:20London Heathrow

€521

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Scandinavian Airlines

15 Mar

LHR06:40London Heathrow

40h 05m

2 stops

ORD17:45Chicago O'Hare Intl

29 Apr

ORD19:15Chicago O'Hare Intl

14h 45m

1 stop

LHR16:00London Heathrow

€523

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Scandinavian Airlines

25 Dec

LHR10:20London Heathrow

12h 25m

1 stop

ORD16:45Chicago O'Hare Intl

18 Apr

ORD19:15Chicago O'Hare Intl

32h 20m

2 stops

LHR09:35London Heathrow

€524

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momondo Fare Finder

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Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 17/3

12:15-18:20

1 stop11h 05m

Chicago O'Hare Intl

Thu 30/4

19:25-11:55

1 stop10h 30m

€518

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 15/3

20:35-18:20

1 stop26h 45m

Chicago O'Hare Intl

Mon 4/5

19:25-11:55

1 stop10h 30m

€519

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sat 18/4

19:15-09:20

1 stop32h 05m

€521

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 15/3

06:40-17:45

2 stops40h 05m

Chicago O'Hare Intl

Wed 29/4

19:15-16:00

1 stop14h 45m

€523

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Mon 20/4

19:15-21:35

2 stops20h 20m

€524

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 25/2

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Sat 28/3

19:25-10:55

1 stop10h 30m

€526

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 19/3

07:05-17:45

2 stops15h 40m

Chicago O'Hare Intl

Wed 29/4

19:15-16:25

2 stops15h 10m

€527

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Tue 10/3

10:40-09:20

2 stops17h 40m

€530

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 14/4

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Thu 14/5

19:25-11:55

1 stop10h 30m

€532

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 12/4

21:25-18:15

1 stop26h 50m

Chicago O'Hare Intl

Thu 14/5

19:25-20:20

1 stop18h 55m

€532

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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

Airlines

Delays

Other information

What is the typical price of a round-trip flight between London Heathrow Airport and Chicago?

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 €500, 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 €507.

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 €661. 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 €3,189.

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 €618 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 €593 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 December 2025, prices for London Heathrow Airport to Chicago flights are approximately 12% more expensive 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	9h 20m
Direct flights	Every day
Airports in Chicago	3 airports

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

Direct flights go from London Heathrow Airport to Chicago every day.

There are 3 airports in Chicago. From London Heathrow Airport there are direct flights to 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 20m 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 35.46% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 20.88%, Boeing 777 with 12.52%, and Boeing 787-10 Dreamliner with 11.89%.

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

Fly into one of these airports located in Chicago

Chicago Midway Airport

Chicago O'Hare Intl Airport

Popular Cities in the United States

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Flights to Washington, D.C.from €363

Flights to Denverfrom €539

Flights to Houstonfrom €534

Flights to Dallasfrom €514

Cheap flights from London Heathrow Airport to Chicago from €451

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Icelandair 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

What is the typical price of a round-trip flight between London Heathrow Airport and 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 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 December 2025, prices for London Heathrow Airport to Chicago flights are approximately 12% more expensive when compared to flights at the same time last year.

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

Austrian Airlines, British Airways, 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 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 Heathrow Airport to Chicago on average per day?

As of December 2025, there are 35 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 68% of flights taking off in the afternoon.

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

As of December 2025, there are 250 flights per week flying from London Heathrow Airport to Chicago. The most common day of the week flights depart is Sat, 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