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.

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 168 minutes.

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

Finnair, JetBlue, and Austrian 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?

The number of flights available between London Heathrow Airport and Chicago is 250 per week as of December 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

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.

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 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 required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$797 Cheap Flights from London Heathrow Airport to Chicago in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $1,003 to $1,518. The lowest price recently found on this route was $941.

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Find the cheapest flights from London Heathrow Airport to Chicago

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

07:05 - 16:45

LHR

ORD

15h 40m2 stops

10:40 - 09:20

ORD

LHR

17h 40m2 stops

$941Scandinavian Airlines

Mon, 2 Mar - Tue, 10 Mar

10:20 - 16:45

LHR

ORD

12h 25m1 stop

10:11 - 16:00

ORD

LHR

23h 49m2 stops

$943Scandinavian Airlines

Fri, 6 Feb - Tue, 17 Feb

07:05 - 16:45

LHR

ORD

15h 40m2 stops

10:11 - 16:00

ORD

LHR

23h 49m2 stops

$949Scandinavian Airlines

Fri, 6 Feb - Tue, 17 Feb

06:40 - 20:53

LHR

ORD

20h 13m2 stops

19:20 - 18:50

ORD

LHR

17h 30m2 stops

$950Scandinavian Airlines

Sat, 24 Jan - Sat, 7 Feb

12:15 - 18:20

LHR

ORD

11h 05m1 stop

19:25 - 11:55

ORD

LHR

10h 30m1 stop

$952Icelandair

Fri, 13 Mar - Tue, 21 Apr

10:20 - 16:45

LHR

ORD

12h 25m1 stop

10:29 - 09:20

ORD

LHR

16h 51m2 stops

$957Scandinavian Airlines

Fri, 16 Jan - Fri, 23 Jan

13:45 - 16:20

LHR

ORD

32h 35m1 stop

21:05 - 11:15

ORD

LHR

8h 10mdirect

$979United Airlines

Wed, 21 Jan - Thu, 29 Jan

09:00 - 16:20

LHR

ORD

13h 20m1 stop

17:50 - 07:55

ORD

LHR

8h 05mdirect

$981United Airlines

Tue, 3 Feb - Mon, 16 Feb

09:00 - 16:20

LHR

ORD

13h 20m1 stop

07:15 - 07:10

ORD

LHR

18h 55m1 stop

$985United Airlines

Mon, 2 Mar - Wed, 18 Mar

10:20 - 16:55

LHR

ORD

12h 35m1 stop

19:15 - 16:00

ORD

LHR

14h 45m1 stop

$987Scandinavian Airlines

Fri, 6 Mar - Mon, 6 Apr

Scandinavian Airlines flights from London Heathrow Airport to Chicago

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

Scandinavian Airlines

2 Mar

LHR07:05London Heathrow

15h 40m

2 stops

ORD16:45Chicago O'Hare Intl

10 Mar

ORD10:40Chicago O'Hare Intl

17h 40m

2 stops

LHR09:20London Heathrow

$941

Find similar

Scandinavian Airlines

6 Feb

LHR10:20London Heathrow

12h 25m

1 stop

ORD16:45Chicago O'Hare Intl

17 Feb

ORD10:11Chicago O'Hare Intl

23h 49m

2 stops

LHR16:00London Heathrow

$943

Find similar

Scandinavian Airlines

6 Feb

LHR07:05London Heathrow

15h 40m

2 stops

ORD16:45Chicago O'Hare Intl

17 Feb

ORD10:11Chicago O'Hare Intl

23h 49m

2 stops

LHR16:00London Heathrow

$949

Find similar

SWISS flights from London Heathrow Airport to Chicago

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

SWISS

4 Mar

LHR20:05London Heathrow

22h 05m

2 stops

ORD12:10Chicago O'Hare Intl

17 Mar

ORD19:50Chicago O'Hare Intl

12h 10m

1 stop

LHR13:00London Heathrow

$1,021

Find similar

SWISS

12 Jan

LHR20:05London Heathrow

22h 40m

1 stop

ORD12:45Chicago O'Hare Intl

19 Jan

ORD16:10Chicago O'Hare Intl

15h 30m

2 stops

LHR13:40London Heathrow

$1,030

Find similar

SWISS

12 Jan

LHR20:05London Heathrow

22h 40m

1 stop

ORD12:45Chicago O'Hare Intl

19 Jan

ORD18:50Chicago O'Hare Intl

15h 50m

2 stops

LHR16:40London Heathrow

$1,032

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 2/3

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Tue 10/3

10:40-09:20

2 stops17h 40m

$941

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 6/2

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Tue 17/2

10:11-16:00

2 stops23h 49m

$943

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 6/2

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Tue 17/2

10:11-16:00

2 stops23h 49m

$949

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 24/1

06:40-20:53

2 stops20h 13m

Chicago O'Hare Intl

Sat 7/2

19:20-18:50

2 stops17h 30m

$950

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/3

12:15-18:20

1 stop11h 05m

Chicago O'Hare Intl

Tue 21/4

19:25-11:55

1 stop10h 30m

$952

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 16/1

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Fri 23/1

10:29-09:20

2 stops16h 51m

$957

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 21/1

13:45-16:20

1 stop32h 35m

Chicago O'Hare Intl

Thu 29/1

21:05-11:15

Nonstop8h 10m

$979

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 3/2

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Mon 16/2

17:50-07:55

Nonstop8h 05m

$981

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 2/3

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Wed 18/3

07:15-07:10

1 stop18h 55m

$985

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 6/3

10:20-16:55

1 stop12h 35m

Chicago O'Hare Intl

Mon 6/4

19:15-16:00

1 stop14h 45m

$987

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 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?

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 $896.

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

Our data shows that Friday is the least expensive day to fly to Chicago. Tickets to fly out on this day can be as low as $890. Flights from London Heathrow Airport to Chicago on a Saturday will generally be more expensive and average around $2,640. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest London Heathrow Airport to Chicago flights are usually those with departure times in the morning. Our users have found flights to Chicago in the morning for as low as $1,185. Flights at midday are often more expensive, with an average ticket price of $1,209.

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 $1,092 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 $1,048 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.

Can stopping save me money on London Heathrow Airport to Chicago flights?

You could potentially save up to 11% on your flight if you consider stops on a London Heathrow Airport to Chicago flight.

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	1 airport

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

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

There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)

Search flight deals

How far is London Heathrow to Chicago by plane?
A flight from London Heathrow to Chicago will travel around 6330.3 km. Flights usually cover this in 9h 20m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Chicago?
Prices for flights from London Heathrow Airport to Chicago are updated daily.
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 required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to Chicago?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport to Chicago is Boeing 767-300 (35.46% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (20.88%), Boeing 777 (12.52%), and Boeing 787-10 Dreamliner (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?

All flight searches from London to Chicago on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Chicago?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight 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?

Price alerts on flights to Chicago from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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

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Look for other cheap flights to Atlantafrom $1,065

Cheap flights from London Heathrow Airport to Chicago from $807

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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

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

momondo Fare Finder

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?

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 $896.

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

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

Our data shows that the cheapest London Heathrow Airport to Chicago flights are usually those with departure times in the morning. Our users have found flights to Chicago in the morning for as low as $1,185. Flights at midday are often more expensive, with an average ticket price of $1,209.

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.

Can stopping save me money on London Heathrow Airport to Chicago flights?

You could potentially save up to 11% on your flight if you consider stops on a London Heathrow Airport to Chicago flight.

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?

Finnair, JetBlue, and Austrian 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 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?

The number of flights available between London Heathrow Airport and Chicago is 250 per week as of December 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving 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