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?

The number of flights available between London Heathrow Airport and Chicago is 259 per week as of January 2026. The most frequent departure day is Tue, with 16% of weekly flights leaving on this day.

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

Delta, Icelandair, and British Airways are the most popular carriers operating from London Heathrow to Chicago

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

As of January 2026, there are 37 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 77% of flights taking off in the afternoon.

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 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.

$711 Cheap Flights from London Heathrow Airport to Chicago in 2026

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Find the cheapest flights from London Heathrow Airport to Chicago

Round-trip

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

12:10 - 19:15

LHR

ORD

13h 05m

1 stop

18:10 - 06:55

ORD

LHR

7h 45mdirect

$802British Airways

Mon, 2 Mar - Sun, 8 Mar

07:05 - 16:10

LHR

ORD

15h 05m

2 stops

19:15 - 16:25

ORD

LHR

15h 10m

2 stops

$804Scandinavian Airlines

Mon, 13 Apr - Sun, 17 May

09:00 - 16:20

LHR

ORD

13h 20m

1 stop

17:50 - 07:55

ORD

LHR

8h 05mdirect

$805United Airlines

Wed, 11 Feb - Mon, 16 Feb

09:50 - 12:54

LHR

ORD

33h 04m

2 stops

12:30 - 07:55

ORD

LHR

13h 25m

1 stop

$808British Airways

Mon, 13 Apr - Thu, 23 Apr

12:05 - 16:20

LHR

ORD

34h 15m

1 stop

18:20 - 06:40

ORD

LHR

30h 20m

1 stop

$810United Airlines

Thu, 12 Feb - Sat, 21 Feb

08:30 - 15:20

LHR

ORD

12h 50m

1 stop

15:45 - 05:55

ORD

LHR

8h 10mdirect

$811Lufthansa

Fri, 23 Jan - Thu, 5 Feb

07:05 - 16:45

LHR

ORD

15h 40m

2 stops

19:10 - 18:50

ORD

LHR

17h 40m

2 stops

$813Scandinavian Airlines

Wed, 28 Jan - Sun, 1 Feb

09:00 - 16:20

LHR

ORD

13h 20m

1 stop

14:30 - 08:30

ORD

LHR

12h 00m

2 stops

$814United Airlines

Tue, 27 Jan - Tue, 3 Feb

07:05 - 16:55

LHR

ORD

15h 50m

2 stops

19:20 - 16:25

ORD

LHR

15h 05m

2 stops

$815Scandinavian Airlines

Thu, 29 Jan - Mon, 2 Feb

09:00 - 16:20

LHR

ORD

13h 20m

1 stop

20:40 - 06:30

ORD

LHR

27h 50m

1 stop

$817United Airlines

Fri, 27 Feb - Fri, 6 Mar

United Airlines flights from London Heathrow Airport to Chicago

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

United Airlines

11 Feb

LHR09:00London Heathrow

13h 20m

1 stop

ORD16:20Chicago O'Hare Intl

16 Feb

ORD17:50Chicago O'Hare Intl

8h 05m

LHR07:55London Heathrow

$805

United Airlines

12 Feb

LHR12:05London Heathrow

34h 15m

1 stop

ORD16:20Chicago O'Hare Intl

21 Feb

ORD18:20Chicago O'Hare Intl

30h 20m

1 stop

LHR06:40London Heathrow

$810

United Airlines

22 Jan

LHR08:30London Heathrow

12h 50m

1 stop

ORD15:20Chicago O'Hare Intl

25 Jan

ORD21:05Chicago O'Hare Intl

8h 10m

LHR11:15London Heathrow

$811

British Airways flights from London Heathrow Airport to Chicago

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

British Airways

2 Mar

LHR07:50London Heathrow

12h 10m

1 stop

ORD14:00Chicago O'Hare Intl

10 Mar

ORD21:35Chicago O'Hare Intl

7h 50m

LHR10:25London Heathrow

$802

British Airways

13 Apr

LHR09:50London Heathrow

33h 04m

2 stops

ORD12:54Chicago O'Hare Intl

23 Apr

ORD12:30Chicago O'Hare Intl

13h 25m

1 stop

LHR07:55London Heathrow

$808

British Airways

18 Jan

LHR08:50London Heathrow

16h 25m

1 stop

ORD19:15Chicago O'Hare Intl

31 Jan

ORD11:39Chicago O'Hare Intl

16h 01m

1 stop

LHR09:40London Heathrow

$817

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

12:10-19:15

1 stop13h 05m

Chicago O'Hare Intl

Sun 8/3

18:10-06:55

Nonstop7h 45m

$802

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/4

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Sun 17/5

19:15-16:25

2 stops15h 10m

$804

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 11/2

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Mon 16/2

17:50-07:55

Nonstop8h 05m

$805

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/4

09:50-12:54

2 stops33h 04m

Chicago O'Hare Intl

Thu 23/4

12:30-07:55

1 stop13h 25m

$808

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/2

12:05-16:20

1 stop34h 15m

Chicago O'Hare Intl

Sat 21/2

18:20-06:40

1 stop30h 20m

$810

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 23/1

08:30-15:20

1 stop12h 50m

Chicago O'Hare Intl

Thu 5/2

15:45-05:55

Nonstop8h 10m

$811

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 28/1

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Sun 1/2

19:10-18:50

2 stops17h 40m

$813

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 27/1

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Tue 3/2

14:30-08:30

2 stops12h 00m

$814

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 29/1

07:05-16:55

2 stops15h 50m

Chicago O'Hare Intl

Mon 2/2

19:20-16:25

2 stops15h 05m

$815

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 27/2

09:00-16:20

1 stop13h 20m

Chicago O'Hare Intl

Fri 6/3

20:40-06:30

1 stop27h 50m

$817

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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 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 $894.

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 $880. Flights from London Heathrow Airport to Chicago on a Saturday will generally be more expensive and average around $2,613. 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 at midday. Our users have found flights to Chicago at midday for as low as $1,196. Flights in the morning are often more expensive, with an average ticket price of $1,751.

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 $1,081 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 $1,035 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 10% 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 January 2026, prices for London Heathrow Airport to Chicago flights are approximately 5% 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).

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 (29.27% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (23.24%), Boeing 777 (12.51%), and Boeing 787-10 Dreamliner (10.28%).

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

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Chicago O'Hare Intl Airport

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Cheap flights from London Heathrow Airport to Chicago from $711

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Find the cheapest flights from London Heathrow Airport to Chicago

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United Airlines flights from London Heathrow Airport to Chicago

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Our best British Airways 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 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 $894.

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 at midday. Our users have found flights to Chicago at midday for as low as $1,196. Flights in the morning are often more expensive, with an average ticket price of $1,751.

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 10% 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 January 2026, prices for London Heathrow Airport to Chicago flights are approximately 5% more expensive when compared to flights at the same time last year.

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

Delta, Icelandair, and British Airways 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 January 2026, there are 37 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 77% 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 259 per week as of January 2026. The most frequent departure day is Tue, with 16% 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