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

Reykjavik (KEF) was the most common stop: 52% of momondo users choosing 1-stop flights on this route connected there.

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

As of January 2026, there are 36 flights per day flying from London to Chicago. The most common time of day flights depart is 12:00PM, with 77% 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 least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

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

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

How many flights depart from London to Chicago on average per week?

258 flights are operational weekly from London to Chicago as of January 2026. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

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 in the evening have, in the past, seen delays more frequently in comparison.

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

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $539.

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

Reykjavik (KEF) has the shortest average layover time for this route: 1h 03m.

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 according to our data. British Airways is the first choice among our users, with 54% 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 has the shortest travel time from London to Chicago?

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 25m.

When did momondo last update prices for flights from London to Chicago?

Prices for flights from London to Chicago refresh daily.

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

As of January 2026, there are 10 operators available to choose from for flights from London to Chicago.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Chicago.

What documentation or ID do you need to fly to Chicago?

The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$401 Cheap Flights from London to Chicago in 2026

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Find the cheapest flights from London to Chicago

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:10 pm - 7:15 pm

LHR

ORD

13h 05m

1 stop

6:30 pm - 8:15 am

ORD

LHR

7h 45mnonstop

$533British Airways

Wed, Feb 11 - Wed, Feb 18

3:10 pm - 8:04 pm

LHR

ORD

34h 54m

2 stops

1:35 pm - 7:20 am

ORD

LHR

11h 45m

1 stop

$534British Airways

Thu, Jan 29 - Mon, Feb 2

3:40 pm - 6:15 pm

LGW

ORD

32h 35m

1 stop

7:25 pm - 2:40 pm

ORD

LGW

13h 15m

1 stop

$535Icelandair

Mon, May 4 - Thu, May 14

12:10 pm - 7:15 pm

LHR

ORD

13h 05m

1 stop

6:30 pm - 8:15 am

ORD

LHR

7h 45mnonstop

$535British Airways

Thu, Feb 5 - Thu, Feb 12

3:35 pm - 4:45 pm

LHR

ORD

31h 10m

2 stops

7:20 pm - 4:25 pm

ORD

LHR

15h 05m

2 stops

$536Scandinavian Airlines

Tue, Jan 27 - Wed, Feb 25

7:40 am - 2:10 pm

LHR

ORD

12h 30m

1 stop

9:15 pm - 11:15 am

ORD

LHR

8h 00mnonstop

$537Lufthansa

Sat, Feb 7 - Wed, Feb 18

6:40 pm - 4:20 pm

LGW

ORD

27h 40m

1 stop

6:50 pm - 5:50 pm

ORD

LGW

17h 00m

1 stop

$539SWISS

Wed, Feb 18 - Sun, Feb 22

11:55 am - 5:20 pm

LGW

ORD

11h 25m

1 stop

6:30 pm - 10:55 am

ORD

LGW

10h 25m

1 stop

$541Icelandair

Fri, Feb 27 - Fri, Mar 6

6:40 am - 4:45 pm

LHR

ORD

16h 05m

2 stops

7:20 pm - 6:30 pm

ORD

LHR

17h 10m

1 stop

$541Scandinavian Airlines

Sat, Feb 7 - Wed, Feb 18

6:40 pm - 12:45 pm

LGW

ORD

24h 05m

1 stop

6:50 pm - 5:50 pm

ORD

LGW

17h 00m

1 stop

$548SWISS

Wed, Feb 11 - Wed, Feb 18

Finnair flights from London to Chicago

Our best Finnair deals on London to Chicago flight tickets

Finnair

Feb 23

LHR10:15 amLondon Heathrow

13h 49m

1 stop

ORD6:04 pmChicago O'Hare Intl

Feb 28

ORD7:18 amChicago O'Hare Intl

32h 52m

2 stops

LHR10:10 pmLondon Heathrow

$573

Finnair

Feb 21

LHR8:20 amLondon Heathrow

15h 23m

1 stop

ORD5:43 pmChicago O'Hare Intl

Feb 28

ORD7:18 amChicago O'Hare Intl

32h 52m

2 stops

LHR10:10 pmLondon Heathrow

$574

Air Canada flights from London to Chicago

Our best Air Canada deals on London to Chicago flight tickets

Air Canada

Jan 22

LHR9:00 amLondon Heathrow

16h 45m

2 stops

ORD7:45 pmChicago O'Hare Intl

Jan 29

ORD12:50 pmChicago O'Hare Intl

12h 20m

1 stop

LHR7:10 amLondon Heathrow

$549

Air Canada

Jan 22

LHR9:00 amLondon Heathrow

16h 45m

2 stops

ORD7:45 pmChicago O'Hare Intl

Feb 4

ORD7:15 amChicago O'Hare Intl

17h 55m

1 stop

LHR7:10 amLondon Heathrow

$550

Air Canada

Feb 3

LHR9:00 amLondon Heathrow

15h 51m

2 stops

ORD6:51 pmChicago O'Hare Intl

Feb 10

ORD1:55 pmChicago O'Hare Intl

15h 25m

2 stops

LHR11:20 amLondon Heathrow

$551

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 2/11

12:10 pm-7:15 pm

1 stop13h 05m

Chicago O'Hare Intl

Wed 2/18

6:30 pm-8:15 am

Nonstop7h 45m

$533

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/29

3:10 pm-8:04 pm

2 stops34h 54m

Chicago O'Hare Intl

Mon 2/2

1:35 pm-7:20 am

1 stop11h 45m

$534

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 5/4

3:40 pm-6:15 pm

1 stop32h 35m

Chicago O'Hare Intl

Thu 5/14

7:25 pm-2:40 pm

1 stop13h 15m

$535

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 2/5

12:10 pm-7:15 pm

1 stop13h 05m

Chicago O'Hare Intl

Thu 2/12

6:30 pm-8:15 am

Nonstop7h 45m

$535

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 1/27

3:35 pm-4:45 pm

2 stops31h 10m

Chicago O'Hare Intl

Wed 2/25

7:20 pm-4:25 pm

2 stops15h 05m

$536

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 2/7

7:40 am-2:10 pm

1 stop12h 30m

Chicago O'Hare Intl

Wed 2/18

9:15 pm-11:15 am

Nonstop8h 00m

$537

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 2/18

6:40 pm-4:20 pm

1 stop27h 40m

Chicago O'Hare Intl

Sun 2/22

6:50 pm-5:50 pm

1 stop17h 00m

$539

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 2/27

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Fri 3/6

6:30 pm-10:55 am

1 stop10h 25m

$541

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 2/7

6:40 am-4:45 pm

2 stops16h 05m

Chicago O'Hare Intl

Wed 2/18

7:20 pm-6:30 pm

1 stop17h 10m

$541

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 2/11

6:40 pm-12:45 pm

1 stop24h 05m

Chicago O'Hare Intl

Wed 2/18

6:50 pm-5:50 pm

1 stop17h 00m

$548

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How to get the cheapest flight ticket from London 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 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, with most prices found around $578. If you’re not able to fly to Chicago in February, then November is your next best option. Flight prices from London to Chicago during November average around $580.

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 $772. 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 to Chicago for around $885.

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 morning. Flights from London to Chicago during this time can be as low as $820. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $925.

What is the cheapest London to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $725 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London for as low as $694 on momondo.

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

There are 4 cabin classes available to choose from on London 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 to Chicago flights?

You could potentially save up to 1% on your flight if you consider stops on a London to Chicago flight.

How have London to Chicago flight prices changed over time?

As of January 2026, prices for London to Chicago flights are approximately 9% more expensive when compared to flights at the same time last year.

When to book flights from London to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from London to Chicago according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap London to Chicago (LON to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago

Best Price Found	$636
Fastest flight time	8h 35m
Direct flights	Every day
Airports in Chicago	3 airports

The best one-way flight to Chicago from London in the past 72 hours is $636. The best round-trip flight deal from London to Chicago found on momondo in the last 72 hours is $731.

The fastest flight from London to Chicago takes 8h 35m

Direct flights go from London to Chicago every day.

There are 3 airports in Chicago. From London there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

How far is London to Chicago by plane?
A flight from London to Chicago will travel around 3945.2 mi. Flights usually cover this in 8h 35m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to Chicago?
Prices for flights from London to Chicago refresh daily.
How many operators does momondo search for flights from London to Chicago?
As of January 2026, there are 10 operators available to choose from for flights from London to Chicago.
How old do you have to be to fly from London to Chicago?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London to Chicago?
momondo data reveals that the most frequently booked plane model on the route from London to Chicago is Boeing 767-300, representing 29.27% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 23.24%, Boeing 777 at 12.51%, and Boeing 787-10 Dreamliner at 10.28%.
What is the most popular airline from London to Chicago?
momondo data reveals that the most frequently booked airline on the route from London to Chicago is British Airways, representing 34% of all bookings. The subsequent popular airlines are American Airlines at 16%, Icelandair at 14%, and United Airlines at 11%.

Best airlines flying from London to Chicago

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

Airline	Rating	Free Cancellation	Price
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.2 1,435 reviews	Search Aer Lingus flights
Icelandair	PriceFrom $453	Free Cancellation	Rating 7.1 596 reviews	Search Icelandair flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,163 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.5 893 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $551	Free Cancellation	Rating 6.7 7,676 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 2,121 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $558	Free Cancellation	Rating 7.0 3,087 reviews	Search Iberia flights
American Airlines	PriceFrom $572	Free Cancellation	Rating 7.2 11,131 reviews	Search American Airlines flights
Finnair	PriceFrom $576	Free Cancellation	Rating 7.6 1,349 reviews	Search Finnair flights
Lufthansa	PriceFrom $720	Free Cancellation	Rating 6.8 7,715 reviews	Search Lufthansa flights

Finnair Flights From London to Chicago
Finnair flight deals from London to Chicago start from $576 round-trip. Over the 28 Finnair flights for this route in a normal week, average airfare is usually $733 round-trip - but some users have found much cheaper deals with momondo.
Austrian Airlines Flights From London to Chicago
The best Austrian Airlines deal for London to Chicago flight tickets found on momondo in the last 72 hours was $530, round-trip. It should be noted that an average Austrian Airlines flight deal for this route in this time was higher, at $897 round-trip. Austrian Airlines operates 15 flights out of London into Chicago in an average week, so prices vary by time and availability. 893 Austrian Airlines reviews by users on momondo have scored the airline at 7.5/10.

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Hammond

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Saint Joseph

Portage

Lansing

Schererville

Valparaiso

Munster

Crown Point

Chesterton

Monticello

Porter

Griffith

Saint John

Why use momondo?

Why should I use momondo to find a flight deal from London to Chicago?

It is quick and easy to find London to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.

Can I find flights from London to Chicago with flexible booking policies on momondo?

Yes. All flights to Chicago from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

If you are not ready to book a flight from London to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.

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Flights to Bostonfrom $50

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Flights to Dallasfrom $50

Flights to Seattlefrom $54

Flights to Denverfrom $56

Cheap flights from London to Chicago from $476

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Chicago departing on 3/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

See travel insights to Chicago from

How to get the cheapest flight ticket from London to Chicago

What is the typical price of a round-trip flight between London 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, with most prices found around $578. If you’re not able to fly to Chicago in February, then November is your next best option. Flight prices from London to Chicago during November average around $580.

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 morning. Flights from London to Chicago during this time can be as low as $820. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $925.

What is the cheapest London to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London - Chicago flight prices

How far in advance should I book a flight to Chicago?

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

There are 4 cabin classes available to choose from on London 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 to Chicago flights?

You could potentially save up to 1% on your flight if you consider stops on a London to Chicago flight.

How have London to Chicago flight prices changed over time?

As of January 2026, prices for London to Chicago flights are approximately 9% more expensive when compared to flights at the same time last year.

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

British Airways, SWISS, and Austrian Airlines are the most popular carriers operating from London 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 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 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 and Chicago?

Reykjavik (KEF) was the most common stop: 52% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $539.

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

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 25m.

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

Reykjavik (KEF) has the shortest average layover time for this route: 1h 03m.

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

As of January 2026, there are 36 flights per day flying from London to Chicago. The most common time of day flights depart is 12:00PM, with 77% of flights taking off in the afternoon.

How many flights depart from London to Chicago on average per week?

258 flights are operational weekly from London to Chicago as of January 2026. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

When to book flights from London to Chicago

Cheap London to Chicago (LON to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago

Best Price Found

Fastest flight time

Direct flights

Airports in Chicago

How far is London to Chicago by plane?

When did momondo last update prices for flights from London to Chicago?

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

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

What documentation or ID do you need to fly to Chicago?

What is the most popular plane model from London to Chicago?

What is the most popular airline from London to Chicago?

Best airlines flying from London to Chicago

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

Finnair Flights From London to Chicago

Austrian Airlines Flights From London to Chicago

Traveling to a place near Chicago?