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

The number of flights available between London Heathrow Airport and Chicago is 39 per day as of December 2025. The most frequent departure time is 12:00, with 65% of daily flights leaving in the afternoon.

Which stopover airport has the shortest connection time from London Heathrow Airport to Chicago?

Frankfurt am Main (FRA) has the shortest average stopover time for this route: 1h 15m.

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

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

Which airlines fly to Chicago?

British Airways, Lufthansa and Finnair are the top three most popular airlines that fly to Chicago from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 69% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 14 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Chicago?

Dublin (DUB) was the most common stop: 41% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport has the shortest travel time from London Heathrow Airport to Chicago?

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 11h 30m.

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 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 276 per week as of December 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

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.

Which stopover airport offers the lowest fares from London Heathrow Airport to Chicago?

Flights via Copenhagen (CPH) offer the lowest average return price of £392.

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.

How many operators does momondo search for flights from London Heathrow Airport to Chicago?

There are 14 operators available for flights from London Heathrow Airport to Chicago as of December 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 license 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.

£307 Cheap Flights from London Heathrow Airport to Chicago in 2025/26

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Find the cheapest flights from London Heathrow Airport to Chicago

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One-way

Last minute

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Cheap return flights

Enter your travel dates to find the best prices.

20:35 - 18:20

LHR

ORD

26h 45m1 stop

19:25 - 11:55

ORD

LHR

10h 30m1 stop

£450Icelandair

Mon, 16 Mar - Thu, 23 Apr

19:30 - 16:45

LHR

ORD

27h 15m1 stop

07:00 - 17:40

ORD

LHR

28h 40m2 stops

£453Scandinavian Airlines

Tue, 20 Jan - Tue, 7 Apr

20:35 - 17:20

LHR

ORD

26h 45m1 stop

19:25 - 11:55

ORD

LHR

10h 30m1 stop

£455Icelandair

Wed, 4 Mar - Tue, 31 Mar

06:00 - 16:00

LHR

ORD

16h 00m1 stop

18:00 - 18:50

ORD

LHR

18h 50m1 stop

£455TAP AIR PORTUGAL

Wed, 8 Apr - Sun, 12 Apr

07:05 - 16:45

LHR

ORD

15h 40m2 stops

13:37 - 17:40

ORD

LHR

23h 03m2 stops

£456Scandinavian Airlines

Mon, 2 Mar - Tue, 10 Mar

08:50 - 15:55

LHR

ORD

37h 05m2 stops

12:07 - 09:05

ORD

LHR

14h 58m1 stop

£457British Airways

Thu, 7 May - Mon, 11 May

12:10 - 19:15

LHR

ORD

13h 05m1 stop

20:45 - 10:25

ORD

LHR

7h 40mdirect

£458British Airways

Sat, 7 Feb - Sat, 14 Feb

15:35 - 14:29

LHR

ORD

28h 54m1 stop

11:40 - 06:20

ORD

LHR

12h 40m1 stop

£460Finnair

Thu, 8 Jan - Wed, 25 Feb

10:45 - 17:45

LHR

MDW

13h 00m1 stop

17:38 - 11:40

MDW

LHR

13h 02m1 stop

£514Virgin Atlantic

Mon, 2 Mar - Tue, 10 Mar

12:30 - 22:29

LHR

MDW

14h 59m1 stop

10:49 - 11:40

MDW

LHR

19h 51m1 stop

£516Virgin Atlantic

Mon, 16 Mar - Mon, 23 Mar

Finnair flights from London Heathrow Airport to Chicago

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

Finnair

8 Jan

LHR15:35London Heathrow

25h 16m

1 stop

ORD10:51Chicago O'Hare Intl

22 Jan

ORD13:35Chicago O'Hare Intl

13h 40m

1 stop

LHR09:15London Heathrow

£460

Find similar

Finnair

8 Jan

LHR15:35London Heathrow

25h 16m

1 stop

ORD10:51Chicago O'Hare Intl

25 Feb

ORD20:45Chicago O'Hare Intl

7h 40m

LHR10:25London Heathrow

£467

Find similar

Finnair

8 Jan

LHR17:00London Heathrow

27h 29m

1 stop

ORD14:29Chicago O'Hare Intl

22 Jan

ORD20:45Chicago O'Hare Intl

7h 40m

LHR10:25London Heathrow

£470

Find similar

Icelandair flights from London Heathrow Airport to Chicago

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

Icelandair

16 Mar

LHR20:35London Heathrow

26h 45m

1 stop

ORD18:20Chicago O'Hare Intl

22 Apr

ORD19:25Chicago O'Hare Intl

10h 30m

1 stop

LHR11:55London Heathrow

£450

Find similar

Icelandair

15 Mar

LHR20:35London Heathrow

26h 45m

1 stop

ORD18:20Chicago O'Hare Intl

16 Apr

ORD19:25Chicago O'Hare Intl

18h 55m

1 stop

LHR20:20London Heathrow

£468

Find similar

Icelandair

18 Mar

LHR12:15London Heathrow

11h 05m

1 stop

ORD18:20Chicago O'Hare Intl

15 Apr

ORD19:25Chicago O'Hare Intl

18h 55m

1 stop

LHR20:20London Heathrow

£478

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 16/3

20:35-18:20

1 stop26h 45m

Chicago O'Hare Intl

Thu 23/4

19:25-11:55

1 stop10h 30m

£450

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 20/1

19:30-16:45

1 stop27h 15m

Chicago O'Hare Intl

Tue 7/4

07:00-17:40

2 stops28h 40m

£453

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

20:35-17:20

1 stop26h 45m

Chicago O'Hare Intl

Tue 31/3

19:25-11:55

1 stop10h 30m

£455

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 8/4

06:00-16:00

1 stop16h 00m

Chicago O'Hare Intl

Sun 12/4

18:00-18:50

1 stop18h 50m

£455

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 2/3

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Tue 10/3

13:37-17:40

2 stops23h 03m

£456

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 7/5

08:50-15:55

2 stops37h 05m

Chicago O'Hare Intl

Mon 11/5

12:07-09:05

1 stop14h 58m

£457

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

12:10-19:15

1 stop13h 05m

Chicago O'Hare Intl

Sat 14/2

20:45-10:25

Nonstop7h 40m

£458

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/1

15:35-14:29

1 stop28h 54m

Chicago O'Hare Intl

Wed 25/2

11:40-06:20

1 stop12h 40m

£460

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 2/3

10:45-17:45

1 stop13h 00m

Chicago Midway

Tue 10/3

17:38-11:40

1 stop13h 02m

£514

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 16/3

12:30-22:29

1 stop14h 59m

Chicago Midway

Mon 23/3

10:49-11:40

1 stop19h 51m

£516

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

Stopovers

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 £440, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Chicago from London Heathrow Airport during September instead. Flights to Chicago in September, while not as cheap as those in February, still average around £445.

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

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as £615. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Chicago is Saturday, with ticket prices averaging around £669.

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

Flying to Chicago from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £502 when looking at flights departing in the evening. Flights in the afternoon are often more expensive, with an average ticket price of £666.

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 £543 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 £520 on momondo.

What cabin class options are available on London Heathrow to Chicago flights?

There are 4 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 8% 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 5% 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

Best price found	£449
Fastest flight time	8h 40m
Direct flights	Every day
Airports in Chicago	3 airports

The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is £449. The best return flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is £546.

The fastest flight from London Heathrow Airport to Chicago takes 8h 40m

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?
The distance between London Heathrow and Chicago is about 3933.5 mi. Typically, this will take 8h 40m by plane in normal conditions.
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 many operators does momondo search for flights from London Heathrow Airport to Chicago?
There are 14 operators available for flights from London Heathrow Airport to Chicago as of December 2025.
How old do you have to be to fly from London Heathrow Airport to Chicago?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 license 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 34.59% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 21.28%, Boeing 777 with 12.60%, and Boeing 787-10 Dreamliner with 11.13%.
What is the most popular airline from London Heathrow Airport to Chicago?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Chicago is British Airways, representing 50% of all bookings. The subsequent popular airlines are Lufthansa at 9%, Icelandair at 6%, and Finnair at 6%.

Best airlines flying from London Heathrow Airport to Chicago

Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom £339	Free Cancellation	Rating 7.0 591 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £346	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Scandinavian Airlines	PriceFrom £361	Free Cancellation	Rating 7.4 1,606 reviews	Search Scandinavian Airlines flights
Aer Lingus	PriceFrom £367	Free Cancellation	Rating 7.2 1,395 reviews	Search Aer Lingus flights
TAP AIR PORTUGAL	PriceFrom £371	Free Cancellation	Rating 7.2 2,091 reviews	Search TAP AIR PORTUGAL flights
Brussels Airlines	PriceFrom £387	Free Cancellation	Rating 7.2 375 reviews	Search Brussels Airlines flights
Lufthansa	PriceFrom £396	Free Cancellation	Rating 6.8 7,634 reviews	Search Lufthansa flights
British Airways	PriceFrom £405	Free Cancellation	Rating 6.7 7,583 reviews	Search British Airways flights
Austrian Airlines	PriceFrom £406	Free Cancellation	Rating 7.6 879 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom £411	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights

Austrian Airlines Flights From London Heathrow Airport to Chicago
Austrian Airlines is one of the most popular airlines flying from London Heathrow Airport to Chicago, operating 20 flights/week on average for this route. A good Austrian Airlines flight deal for London Heathrow Airport to Chicago starts from £406 round-trip, up to an average price of £609. Our users have rated Austrian Airlines at 7.6/10.
Finnair Flights From London Heathrow Airport to Chicago
£440 is the best Finnair flight deal from London Heathrow Airport to Chicago found on momondo over the last 72 hours. The average Finnair ticket price found was closer to £559, however, with flight time and availability significantly affecting the price. Finnair (7.6/10 from 1,338 user reviews) flies into Chicago from London Heathrow Airport 28 times in an average week so prices can vary.

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?

Flights from London to Chicago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

Yes. momondo can track prices for London to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from London Heathrow Airport to Chicago from £393

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Finnair flights from London Heathrow Airport to Chicago

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

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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 cheapest month to fly to Chicago?

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?

Flying to Chicago from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £502 when looking at flights departing in the evening. Flights in the afternoon are often more expensive, with an average ticket price of £666.

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 4 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 8% 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 5% cheaper when compared to flights at the same time last year.

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

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

Which airlines fly 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.

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Chicago?

Dublin (DUB) was the most common stop: 41% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London Heathrow Airport to Chicago?

Flights via Copenhagen (CPH) offer the lowest average return price of £392.

Which stopover airport has the shortest travel time from London Heathrow Airport to Chicago?

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 11h 30m.

Which stopover airport has the shortest connection time from London Heathrow Airport to Chicago?

Frankfurt am Main (FRA) has the shortest average stopover time for this route: 1h 15m.

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

The number of flights available between London Heathrow Airport and Chicago is 39 per day as of December 2025. The most frequent departure time is 12:00, with 65% of daily flights leaving 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 276 per week as of December 2025. The most frequent departure day is Mon, with 15% 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

Best price found

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 many operators does momondo search 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?

What is the most popular airline from London Heathrow Airport to Chicago?

Best airlines flying from London Heathrow Airport to Chicago

Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago with momondo

Austrian Airlines Flights From London Heathrow Airport to Chicago

Finnair Flights 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?