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 week?

360 flights are operational weekly from London to Chicago as of August 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

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

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $491.

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

As of August 2025, there are 51 flights per day flying from London to Chicago. The most common time of day flights depart is 2:00PM, with 53% of flights taking off in the afternoon.

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

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 11h 00m.

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 53% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 11 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

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

Aer Lingus, TAP AIR PORTUGAL, and Scandinavian Airlines are the most popular carriers operating from London to Chicago

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

Dublin (DUB) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

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 August 2025, there are 11 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.

$431 Cheap Flights from London to Chicago in 2025

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Find the cheapest flights from London to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

2:00 pm - 6:50 pmLGW-ORD

34h 50m1 stop

6:44 pm - 6:20 amORD-LGW

29h 36m2 stops

$572

Find Deal

Wed, Sep 3 - Tue, Sep 16

6:30 am - 2:55 pmLHR-ORD

14h 25m1 stop

4:00 pm - 6:20 amORD-LHR

8h 20mnonstop

$572United Airlines

Find Deal

Mon, Sep 8 - Thu, Sep 18

1:05 pm - 9:15 pmLHR-ORD

14h 10m1 stop

10:15 pm - 11:55 amORD-LHR

31h 40m1 stop

$573Icelandair

Find Deal

Fri, Aug 29 - Fri, Sep 5

2:00 pm - 8:53 amLGW-MDW

24h 53m1 stop

9:48 am - 10:00 amMDW-LGW

18h 12m1 stop

$574

Find Deal

Thu, Sep 11 - Fri, Sep 19

1:05 pm - 9:15 pmLHR-ORD

14h 10m1 stop

6:30 pm - 10:50 amORD-LHR

10h 20m1 stop

$575Icelandair

Find Deal

Thu, Aug 28 - Mon, Mar 2

1:10 pm - 3:55 pmLHR-ORD

8h 45mnonstop

10:35 pm - 12:15 pmORD-LHR

7h 40mnonstop

$580British Airways

Find Deal

Fri, Sep 19 - Mon, Sep 22

12:35 pm - 3:25 pmLHR-ORD

8h 50mnonstop

5:10 pm - 6:55 amORD-LHR

7h 45mnonstop

$581British Airways

Find Deal

Thu, Nov 6 - Wed, Nov 12

7:40 am - 3:45 pmLHR-ORD

14h 05m1 stop

8:40 pm - 10:30 amORD-LHR

7h 50mnonstop

$585American Airlines

Find Deal

Fri, Sep 26 - Sat, Oct 4

6:30 am - 12:55 pmLHR-ORD

12h 25m1 stop

9:50 pm - 11:45 amORD-LHR

7h 55mnonstop

$615Lufthansa

Find Deal

Mon, Sep 8 - Wed, Sep 17

8:45 am - 2:55 pmLCY-ORD

12h 10m1 stop

6:35 pm - 4:25 pmORD-LCY

15h 50m1 stop

$637Lufthansa

Find Deal

Wed, Sep 3 - Wed, Sep 17

SWISS flights from London to Chicago

Our best SWISS deals on London to Chicago flight tickets

SWISS

Oct 2

LCY9:25 amLondon City

12h 30m

1 stop

ORD3:55 pmChicago O'Hare Intl

Oct 9

ORD7:05 pmChicago O'Hare Intl

16h 10m

1 stop

LCY5:15 pmLondon City

$585

Find similar

SWISS

Oct 2

LCY9:25 amLondon City

12h 30m

1 stop

ORD3:55 pmChicago O'Hare Intl

Oct 7

ORD7:05 pmChicago O'Hare Intl

16h 25m

1 stop

LCY5:30 pmLondon City

$590

Find similar

SWISS

Dec 6

LCY8:40 amLondon City

13h 40m

1 stop

ORD4:20 pmChicago O'Hare Intl

Dec 7

ORD6:50 pmChicago O'Hare Intl

17h 50m

1 stop

LCY6:40 pmLondon City

$593

Find similar

Icelandair flights from London to Chicago

Our best Icelandair deals on London to Chicago flight tickets

Icelandair

Aug 29

LHR1:05 pmLondon Heathrow

14h 10m

1 stop

ORD9:15 pmChicago O'Hare Intl

Sep 5

ORD10:15 pmChicago O'Hare Intl

31h 40m

1 stop

LHR11:55 amLondon Heathrow

$573

Find similar

Icelandair

Aug 28

LHR1:05 pmLondon Heathrow

14h 10m

1 stop

ORD9:15 pmChicago O'Hare Intl

Mar 2

ORD6:30 pmChicago O'Hare Intl

10h 20m

1 stop

LHR10:50 amLondon Heathrow

$575

Find similar

Icelandair

Aug 26

LGW3:40 pmLondon Gatwick

11h 35m

1 stop

ORD9:15 pmChicago O'Hare Intl

Sep 2

ORD10:15 pmChicago O'Hare Intl

10h 25m

1 stop

LGW2:40 pmLondon Gatwick

$577

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 9/3

2:00 pm-6:50 pm

1 stop34h 50m

Chicago O'Hare Intl

Tue 9/16

6:44 pm-6:20 am

2 stops29h 36m

$572

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/8

6:30 am-2:55 pm

1 stop14h 25m

Chicago O'Hare Intl

Thu 9/18

4:00 pm-6:20 am

Nonstop8h 20m

$572

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 8/29

1:05 pm-9:15 pm

1 stop14h 10m

Chicago O'Hare Intl

Fri 9/5

10:15 pm-11:55 am

1 stop31h 40m

$573

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Thu 9/11

2:00 pm-8:53 am

1 stop24h 53m

Chicago Midway

Fri 9/19

9:48 am-10:00 am

1 stop18h 12m

$574

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 8/28

1:05 pm-9:15 pm

1 stop14h 10m

Chicago O'Hare Intl

Mon 3/2

6:30 pm-10:50 am

1 stop10h 20m

$575

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 9/19

1:10 pm-3:55 pm

Nonstop8h 45m

Chicago O'Hare Intl

Mon 9/22

10:35 pm-12:15 pm

Nonstop7h 40m

$580

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/6

12:35 pm-3:25 pm

Nonstop8h 50m

Chicago O'Hare Intl

Wed 11/12

5:10 pm-6:55 am

Nonstop7h 45m

$581

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 9/26

7:40 am-3:45 pm

1 stop14h 05m

Chicago O'Hare Intl

Sat 10/4

8:40 pm-10:30 am

Nonstop7h 50m

$585

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/8

6:30 am-12:55 pm

1 stop12h 25m

Chicago O'Hare Intl

Wed 9/17

9:50 pm-11:45 am

Nonstop7h 55m

$615

LondonChicago

LCY - ORD

LCYORD

London City

Wed 9/3

8:45 am-2:55 pm

1 stop12h 10m

Chicago O'Hare Intl

Wed 9/17

6:35 pm-4:25 pm

1 stop15h 50m

$637

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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

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 $579. If you’re not able to fly to Chicago in February, then March is your next best option. Flight prices from London to Chicago during March average around $605.

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 $774. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London to Chicago for around $903.

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 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 $907.

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 $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 for as low as $698 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?

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

How have London to Chicago flight prices changed over time?

As of August 2025, prices for London to Chicago flights are approximately 41% 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	$563
Fastest flight time	8h 35m
Direct flights	Every day
Airports in Chicago	2 airports

The best one-way flight to Chicago from London in the past 72 hours is $563. The best round-trip flight deal from London to Chicago found on momondo in the last 72 hours is $572.

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

Direct flights go from London to Chicago every day.

There are 2 airports near Chicago: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)

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 August 2025, there are 11 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 45.29% of all bookings. The subsequent popular models are Boeing 777 at 12.39%, Boeing 787-9 Dreamliner at 12.21%, and Boeing 787-10 Dreamliner at 11.43%.
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 38% of all bookings. The subsequent popular airlines are American Airlines at 13%, Icelandair at 11%, and United Airlines at 9%.

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
Icelandair	PriceFrom $390	Free Cancellation	Rating 7.0 527 reviews	Search Icelandair flights
Scandinavian Airlines	PriceFrom $462	Free Cancellation	Rating 7.4 1,470 reviews	Search Scandinavian Airlines flights
Aer Lingus	PriceFrom $484	Free Cancellation	Rating 7.2 1,220 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
British Airways	PriceFrom $552	Free Cancellation	Rating 6.6 7,277 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 1,954 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $582	Free Cancellation	Rating 7.0 2,884 reviews	Search Iberia flights
American Airlines	PriceFrom $583	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Austrian Airlines	PriceFrom $586	Free Cancellation	Rating 7.6 829 reviews	Search Austrian Airlines flights
Finnair	PriceFrom $607	Free Cancellation	Rating 7.6 1,320 reviews	Search Finnair flights

Austrian Airlines Flights From London to Chicago
Austrian Airlines flight deals from London to Chicago start from $586 round-trip. Over the 21 Austrian Airlines flights for this route in a normal week, average airfare is usually $987 round-trip - but some users have found much cheaper deals with momondo.
Finnair Flights From London to Chicago
The best Finnair deal for London to Chicago flight tickets found on momondo in the last 72 hours was $607, round-trip. It should be noted that an average Finnair flight deal for this route in this time was higher, at $809 round-trip. Finnair operates 34 flights out of London into Chicago in an average week, so prices vary by time and availability. 1,320 Finnair reviews by users on momondo have scored the airline at 7.6/10.

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Hammond

Benton Harbor

Saint Joseph

Lansing

Portage

Schererville

Valparaiso

Crown Point

Munster

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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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

Chicago Greater Rockford Airport

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Flights to New Yorkfrom $47

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Flights to San Franciscofrom $51

Flights to Washington, D.C.from $53

Flights to Bostonfrom $73

Flights to Atlantafrom $47

Flights to Dallasfrom $53

Flights to Seattlefrom $76

Flights to Denverfrom $63

Cheap flights from London to Chicago from $563

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 9/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Cheap round-trip flights

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SWISS flights from London to Chicago

Our best SWISS deals on London to Chicago flight tickets

Icelandair flights from London to Chicago

Our best Icelandair deals on London to Chicago flight tickets

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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

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 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 $579. If you’re not able to fly to Chicago in February, then March is your next best option. Flight prices from London to Chicago during March average around $605.

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 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 $907.

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?

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

How have London to Chicago flight prices changed over time?

As of August 2025, prices for London to Chicago flights are approximately 41% more expensive when compared to flights at the same time last year.

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

Aer Lingus, TAP AIR PORTUGAL, and Scandinavian Airlines are the most popular carriers operating from London to Chicago

What airlines fly to Chicago?

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

Dublin (DUB) was the most common stop: 41% 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 $491.

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

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 11h 00m.

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 August 2025, there are 51 flights per day flying from London to Chicago. The most common time of day flights depart is 2:00PM, with 53% of flights taking off in the afternoon.

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

360 flights are operational weekly from London to Chicago as of August 2025. The most popular departure day for this route is Mon, with 15% 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

Austrian Airlines Flights From London to Chicago

Finnair Flights From London to Chicago

Traveling to a place near 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, organize and travel with friends or family. Trips is free — and available to use no matter where you book.