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

United Airlines, SWISS, and Delta are the most popular carriers operating from London Heathrow to Chicago

What is the most punctual flight time for London to Chicago flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Which airline has the best punctuality record on London to Chicago flights?

According to our data, United Airlines have had the least number of 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?

The number of flights available between London Heathrow Airport and Chicago is 40 per day as of December 2025. The most frequent departure time is 12:00PM, with 65% of daily flights leaving in the afternoon.

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

Dublin (DUB) has the shortest average layover time for this route: 1h 20m.

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

Dublin (DUB) was the most common stop: 78% of momondo users choosing 1-stop flights on this route connected there.

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 airlines fly to Chicago?

British Airways, American Airlines and Aer Lingus 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 55% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 10 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

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

Flights via Dublin (DUB) offer the lowest average round-trip price of $636.

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 281 per week as of December 2025. The most frequent departure day is Sat, with 16% of weekly flights leaving on this day.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 10m.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

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

There are 10 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 travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$451 Cheap Flights from London Heathrow Airport to Chicago in 2025/26

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12:10 pm - 7:15 pmLHR-ORD

13h 05m1 stop

8:45 pm - 10:25 amORD-LHR

7h 40mnonstop

$584British Airways

Find Deal

Fri, Jan 16 - Fri, Jan 23

7:40 am - 2:00 pmLHR-ORD

12h 20m1 stop

8:30 pm - 10:30 amORD-LHR

8h 00mnonstop

$586British Airways

Find Deal

Thu, Apr 30 - Fri, May 8

6:40 am - 10:01 pmLHR-ORD

21h 21m2 stops

7:20 pm - 6:50 pmORD-LHR

17h 30m2 stops

$587Scandinavian Airlines

Find Deal

Mon, Jan 12 - Mon, Jan 26

9:00 am - 4:20 pmLHR-ORD

13h 20m1 stop

9:05 pm - 11:15 amORD-LHR

8h 10mnonstop

$589United Airlines

Find Deal

Fri, Jan 16 - Sun, Jan 18

1:45 pm - 4:20 pmLHR-ORD

32h 35m1 stop

5:50 pm - 7:55 amORD-LHR

8h 05mnonstop

$590United Airlines

Find Deal

Sat, Jan 24 - Sat, Feb 7

8:30 am - 3:20 pmLHR-ORD

12h 50m1 stop

5:50 pm - 7:55 amORD-LHR

8h 05mnonstop

$595United Airlines

Find Deal

Mon, Jan 12 - Mon, Jan 26

12:15 pm - 6:20 pmLHR-ORD

11h 05m1 stop

10:40 pm - 8:20 pmORD-LHR

15h 40m1 stop

$598Icelandair

Find Deal

Sat, Mar 14 - Tue, Jun 16

12:50 pm - 7:15 pmLHR-ORD

12h 25m1 stop

6:25 pm - 8:15 amORD-LHR

7h 50mnonstop

$599British Airways

Find Deal

Wed, Feb 4 - Sun, Feb 8

8:35 pm - 5:20 pmLHR-ORD

26h 45m1 stop

6:30 pm - 7:30 pmORD-LHR

19h 00m1 stop

$602Icelandair

Find Deal

Sun, Jan 18 - Sun, Feb 8

6:50 am - 6:45 pmLHR-ORD

17h 55m2 stops

4:47 pm - 8:30 amORD-LHR

10h 43m1 stop

$603Air Canada

Find Deal

Wed, Mar 4 - Tue, Mar 10

British Airways flights from London Heathrow Airport to Chicago

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

British Airways

Jan 16

LHR12:10 pmLondon Heathrow

13h 05m

1 stop

ORD7:15 pmChicago O'Hare Intl

Jan 23

ORD8:45 pmChicago O'Hare Intl

7h 40m

LHR10:25 amLondon Heathrow

$584

Find similar

British Airways

Apr 30

LHR7:40 amLondon Heathrow

12h 20m

1 stop

ORD2:00 pmChicago O'Hare Intl

May 8

ORD8:30 pmChicago O'Hare Intl

8h 00m

LHR10:30 amLondon Heathrow

$586

Find similar

British Airways

Feb 4

LHR12:50 pmLondon Heathrow

12h 25m

1 stop

ORD7:15 pmChicago O'Hare Intl

Feb 8

ORD5:10 pmChicago O'Hare Intl

7h 45m

LHR6:55 amLondon Heathrow

$599

Find similar

Scandinavian Airlines flights from London Heathrow Airport to Chicago

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

Scandinavian Airlines

Jan 12

LHR6:40 amLondon Heathrow

21h 21m

2 stops

ORD10:01 pmChicago O'Hare Intl

Jan 26

ORD7:20 pmChicago O'Hare Intl

17h 30m

2 stops

LHR6:50 pmLondon Heathrow

$587

Find similar

Scandinavian Airlines

Mar 20

LHR10:20 amLondon Heathrow

12h 25m

1 stop

ORD5:45 pmChicago O'Hare Intl

Mar 22

ORD8:20 pmChicago O'Hare Intl

15h 05m

2 stops

LHR4:25 pmLondon Heathrow

$605

Find similar

Scandinavian Airlines

Mar 4

LHR7:05 amLondon Heathrow

15h 40m

2 stops

ORD4:45 pmChicago O'Hare Intl

Mar 10

ORD10:40 amChicago O'Hare Intl

17h 40m

2 stops

LHR9:20 amLondon Heathrow

$606

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.

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Route

Depart

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Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 1/16

12:10 pm-7:15 pm

1 stop13h 05m

Chicago O'Hare Intl

Fri 1/23

8:45 pm-10:25 am

Nonstop7h 40m

$584

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/30

7:40 am-2:00 pm

1 stop12h 20m

Chicago O'Hare Intl

Fri 5/8

8:30 pm-10:30 am

Nonstop8h 00m

$586

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/12

6:40 am-10:01 pm

2 stops21h 21m

Chicago O'Hare Intl

Mon 1/26

7:20 pm-6:50 pm

2 stops17h 30m

$587

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 1/16

9:00 am-4:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Sun 1/18

9:05 pm-11:15 am

Nonstop8h 10m

$589

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 1/24

1:45 pm-4:20 pm

1 stop32h 35m

Chicago O'Hare Intl

Sat 2/7

5:50 pm-7:55 am

Nonstop8h 05m

$590

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/12

8:30 am-3:20 pm

1 stop12h 50m

Chicago O'Hare Intl

Mon 1/26

5:50 pm-7:55 am

Nonstop8h 05m

$595

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 3/14

12:15 pm-6:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Tue 6/16

10:40 pm-8:20 pm

1 stop15h 40m

$598

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 2/4

12:50 pm-7:15 pm

1 stop12h 25m

Chicago O'Hare Intl

Sun 2/8

6:25 pm-8:15 am

Nonstop7h 50m

$599

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 1/18

8:35 pm-5:20 pm

1 stop26h 45m

Chicago O'Hare Intl

Sun 2/8

6:30 pm-7:30 pm

1 stop19h 00m

$602

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/4

6:50 am-6:45 pm

2 stops17h 55m

Chicago O'Hare Intl

Tue 3/10

4:47 pm-8:30 am

1 stop10h 43m

$603

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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

Layovers

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 month of February is, on average, the cheapest month to fly to Chicago from London Heathrow Airport, with most prices found around $598. If you’re not able to fly to Chicago in February, then September is your next best option. Flight prices from London Heathrow Airport to Chicago during September average around $600.

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 $780. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Chicago for around $872.

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

Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from London Heathrow Airport to Chicago during this time can be as low as $653. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $880.

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 $733 when searching weeks out. 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 $697 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?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Chicago.

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 16% 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 round-trip 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	$615
Fastest flight time	8h 40m
Direct flights	Every day
Airports in Chicago	1 airport

The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is $615. The best round-trip flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is $756.

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

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?
There are 3933.5 mi between London Heathrow and Chicago. 8h 35m 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 many operators does momondo search for flights from London Heathrow Airport to Chicago?
There are 10 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 travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek 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?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Chicago is Boeing 767-300, representing 40.86% of all bookings. The subsequent popular models are Boeing 777 at 14.21%, Boeing 787-10 Dreamliner at 14.21%, and Boeing 787-9 Dreamliner at 8.84%.
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 44% of all bookings. The subsequent popular airlines are American Airlines at 23%, Icelandair at 9%, and Aer Lingus at 8%.

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
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.2 1,384 reviews	Search Aer Lingus flights
Icelandair	PriceFrom $451	Free Cancellation	Rating 7.0 584 reviews	Search Icelandair flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,059 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.6 875 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $552	Free Cancellation	Rating 6.7 7,549 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 2,079 reviews	Search TAP AIR PORTUGAL flights
American Airlines	PriceFrom $572	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Iberia	PriceFrom $599	Free Cancellation	Rating 7.0 3,037 reviews	Search Iberia flights
Finnair	PriceFrom $625	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
Lufthansa	PriceFrom $720	Free Cancellation	Rating 6.8 7,600 reviews	Search Lufthansa flights

Austrian Airlines Flights From London Heathrow Airport to Chicago
Austrian Airlines flight deals from London Heathrow Airport to Chicago start from $530 round-trip. Over the 22 Austrian Airlines flights for this route in a normal week, average airfare is usually $943 round-trip - but some users have found much cheaper deals with momondo.
Finnair Flights From London Heathrow Airport to Chicago
Another popular option for London Heathrow Airport to Chicago flights is Finnair (7.6/10, 1,334 ratings). Finnair flies from London Heathrow Airport to Chicago around 25 times per week, with deals starting from $625 round-trip and rising to an average price of around $809.

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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 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.

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Of course. momondo tracks the price of London to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from London Heathrow Airport to Chicago from $539

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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

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

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 time of day to depart on your flight to Chicago?

Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from London Heathrow Airport to Chicago during this time can be as low as $653. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $880.

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?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Chicago.

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 16% cheaper when compared to flights at the same time last year.

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

United Airlines, SWISS, and Delta are the most popular carriers operating from London Heathrow to Chicago

What 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 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 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 which experiences the fewest number of 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 least number of 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 layover for flights between London Heathrow Airport and Chicago?

Dublin (DUB) was the most common stop: 78% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Dublin (DUB) offer the lowest average round-trip price of $636.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 10m.

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

Dublin (DUB) has the shortest average layover time for this route: 1h 20m.

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 40 per day as of December 2025. The most frequent departure time is 12:00PM, 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 281 per week as of December 2025. 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

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

Traveling to a place near Chicago?

Why use momondo?