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 170 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.

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 39 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 65% 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 277 per week as of January 2026. The most frequent departure day is Sat, with 16% of weekly flights leaving 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 is the cheapest airline that flies from London Heathrow to Chicago?

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

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.

$700 Cheap Flights from London Heathrow Airport to Chicago in 2026

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Find the cheapest flights from London Heathrow Airport to Chicago

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One-way

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Enter your travel dates to find the best prices.

12:15 - 17:20

LHR

ORD

11h 05m

1 stop

18:30 - 19:30

ORD

LHR

19h 00m

1 stop

$765Icelandair

Thu, 19 Feb - Mon, 23 Feb

20:35 - 17:20

LHR

ORD

26h 45m

1 stop

19:30 - 10:50

ORD

LHR

10h 20m

1 stop

$768Icelandair

Mon, 2 Mar - Sun, 8 Mar

08:50 - 20:04

LHR

ORD

17h 14m

2 stops

12:30 - 10:55

ORD

LHR

16h 25m

1 stop

$774British Airways

Mon, 9 Feb - Sat, 2 May

12:10 - 19:15

LHR

ORD

13h 05m

1 stop

21:35 - 10:25

ORD

LHR

7h 50mdirect

$783British Airways

Wed, 4 Mar - Tue, 10 Mar

07:50 - 19:15

LHR

ORD

17h 25m

1 stop

16:10 - 11:15

ORD

LHR

13h 05m

1 stop

$787British Airways

Sun, 15 Feb - Tue, 24 Feb

08:50 - 20:04

LHR

ORD

17h 14m

2 stops

19:05 - 09:05

ORD

LHR

8h 00mdirect

$788British Airways

Mon, 9 Feb - Thu, 30 Apr

08:30 - 15:20

LHR

ORD

12h 50m

1 stop

16:25 - 06:45

ORD

LHR

8h 20mdirect

$790United Airlines

Sat, 28 Feb - Tue, 31 Mar

08:30 - 16:20

LHR

ORD

12h 50m

1 stop

13:55 - 06:30

ORD

LHR

10h 35m

1 stop

$791United Airlines

Sun, 15 Mar - Mon, 30 Mar

06:40 - 16:45

LHR

ORD

16h 05m

1 stop

19:10 - 18:50

ORD

LHR

17h 40m

2 stops

$793Scandinavian Airlines

Fri, 20 Feb - Sun, 22 Feb

07:40 - 15:10

LHR

ORD

12h 30m

1 stop

21:20 - 11:45

ORD

LHR

8h 25mdirect

$794Multiple Airlines

Mon, 16 Mar - Tue, 31 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

28 Feb

LHR08:30London Heathrow

12h 50m

1 stop

ORD15:20Chicago O'Hare Intl

31 Mar

ORD16:25Chicago O'Hare Intl

8h 20m

LHR06:45London Heathrow

$790

United Airlines

15 Mar

LHR08:30London Heathrow

12h 50m

1 stop

ORD16:20Chicago O'Hare Intl

30 Mar

ORD13:55Chicago O'Hare Intl

10h 35m

1 stop

LHR06:30London Heathrow

$791

United Airlines

19 Feb

LHR06:30London Heathrow

12h 55m

1 stop

ORD13:25Chicago O'Hare Intl

23 Feb

ORD21:15Chicago O'Hare Intl

8h 00m

LHR11:15London Heathrow

$803

Air Canada flights from London Heathrow Airport to Chicago

Our best Air Canada deals on London Heathrow Airport to Chicago flight tickets

Air Canada

3 Feb

LHR09:00London Heathrow

15h 51m

2 stops

ORD18:51Chicago O'Hare Intl

8 Feb

ORD12:50Chicago O'Hare Intl

12h 20m

1 stop

LHR07:10London Heathrow

$803

Air Canada

10 Mar

LHR06:00London Heathrow

17h 40m

2 stops

ORD18:40Chicago O'Hare Intl

17 Mar

ORD12:50Chicago O'Hare Intl

13h 20m

1 stop

LHR07:10London Heathrow

$810

Air Canada

3 Feb

LHR09:00London Heathrow

17h 10m

2 stops

ORD20:10Chicago O'Hare Intl

8 Feb

ORD10:00Chicago O'Hare Intl

15h 10m

2 stops

LHR07:10London Heathrow

$816

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

Thu 19/2

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Mon 23/2

18:30-19:30

1 stop19h 00m

$765

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 2/3

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Sun 8/3

19:30-10:50

1 stop10h 20m

$768

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/2

08:50-20:04

2 stops17h 14m

Chicago O'Hare Intl

Sat 2/5

12:30-10:55

1 stop16h 25m

$774

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

12:10-19:15

1 stop13h 05m

Chicago O'Hare Intl

Tue 10/3

21:35-10:25

Nonstop7h 50m

$783

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 15/2

07:50-19:15

1 stop17h 25m

Chicago O'Hare Intl

Tue 24/2

16:10-11:15

1 stop13h 05m

$787

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/2

08:50-20:04

2 stops17h 14m

Chicago O'Hare Intl

Thu 30/4

19:05-09:05

Nonstop8h 00m

$788

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 28/2

08:30-15:20

1 stop12h 50m

Chicago O'Hare Intl

Tue 31/3

16:25-06:45

Nonstop8h 20m

$790

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 15/3

08:30-16:20

1 stop12h 50m

Chicago O'Hare Intl

Mon 30/3

13:55-06:30

1 stop10h 35m

$791

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 20/2

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Sun 22/2

19:10-18:50

2 stops17h 40m

$793

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 16/3

07:40-15:10

1 stop12h 30m

Chicago O'Hare Intl

Tue 31/3

21:20-11:45

Nonstop8h 25m

$794

Flights are sorted by cheapest return flights first.

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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 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 $862.

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 $856. Flights from London Heathrow Airport to Chicago on a Saturday will generally be more expensive and average around $2,540. 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 $1,163. Flights in the morning are often more expensive, with an average ticket price of $1,702.

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 $1,051 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 $1,006 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 0% 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	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. 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 (26.56% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (23.77%), Boeing 777 (13.14%), and Boeing 787-10 Dreamliner (10.25%).

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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Cheap flights from London Heathrow Airport to Chicago from $700

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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

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

Air Canada flights from London Heathrow Airport to Chicago

Our best Air Canada 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 $862.

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 $1,163. Flights in the morning are often more expensive, with an average ticket price of $1,702.

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 0% cheaper when compared to flights at the same time last year.

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

Icelandair, Finnair, and Delta 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 170 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 39 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 12:00, with 65% 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 277 per week as of January 2026. The most frequent departure day is Sat, 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