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.

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

228 flights are operational weekly from London to Chicago as of November 2025. The most popular departure day for this route is Mon, with 18% 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 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.

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

Reykjavik (KEF) 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 $539.

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

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

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 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.

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

As of November 2025, there are 32 flights per day flying from London to Chicago. The most common time of day flights depart is 12:00PM, with 67% of flights taking off in the afternoon.

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

British Airways, United Airlines, and American Airlines are the most popular carriers operating from London to Chicago

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 November 2025, 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.

$459 Cheap Flights from London to Chicago in 2025/26

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11:55 am - 5:20 pmLGW-ORD

11h 25m1 stop

7:30 pm - 10:55 amORD-LGW

10h 25m1 stop

$560Icelandair

Find Deal

Wed, Mar 4 - Tue, Mar 10

12:15 pm - 5:20 pmLHR-ORD

11h 05m1 stop

6:30 pm - 7:30 pmORD-LHR

19h 00m1 stop

$564Icelandair

Find Deal

Tue, Dec 9 - Tue, Dec 16

9:45 pm - 4:55 pmSTN-ORD

25h 10m2 stops

7:10 pm - 11:00 pmORD-STN

21h 50m2 stops

$567Multiple Airlines

Find Deal

Sat, Feb 7 - Sun, Feb 15

9:00 pm - 4:55 pmLTN-ORD

25h 55m2 stops

7:10 pm - 10:00 pmORD-LTN

20h 50m2 stops

$569Multiple Airlines

Find Deal

Sat, Feb 7 - Sun, Feb 15

12:10 pm - 5:55 pmLHR-ORD

11h 45m1 stop

6:35 pm - 8:15 amORD-LHR

7h 40mnonstop

$576British Airways

Find Deal

Tue, Dec 2 - Mon, Dec 8

6:30 am - 2:00 pmLHR-ORD

13h 30m1 stop

6:35 pm - 8:15 amORD-LHR

7h 40mnonstop

$580British Airways

Find Deal

Thu, Dec 4 - Tue, Dec 9

7:50 am - 2:00 pmLHR-ORD

12h 10m1 stop

3:50 pm - 8:05 amORD-LHR

10h 15m1 stop

$583Aer Lingus

Find Deal

Sat, Dec 6 - Wed, Dec 17

6:40 am - 4:45 pmLHR-ORD

16h 05m1 stop

7:20 pm - 6:30 pmORD-LHR

17h 10m1 stop

$584Scandinavian Airlines

Find Deal

Thu, Dec 4 - Mon, Dec 8

6:40 pm - 4:45 pmLHR-ORD

28h 05m1 stop

7:20 pm - 5:40 pmORD-LHR

16h 20m1 stop

$585Scandinavian Airlines

Find Deal

Wed, Dec 3 - Mon, Dec 8

11:20 am - 3:40 pmLGW-ORD

34h 20m2 stops

6:05 am - 7:30 amORD-LGW

19h 25m2 stops

$589American Airlines

Find Deal

Wed, Feb 4 - Sun, Feb 8

British Airways flights from London to Chicago

Our best British Airways deals on London to Chicago flight tickets

British Airways

Dec 2

LHR12:10 pmLondon Heathrow

11h 45m

1 stop

ORD5:55 pmChicago O'Hare Intl

Dec 8

ORD6:35 pmChicago O'Hare Intl

7h 40m

LHR8:15 amLondon Heathrow

$576

Find similar

British Airways

Dec 4

LHR6:30 amLondon Heathrow

13h 30m

1 stop

ORD2:00 pmChicago O'Hare Intl

Dec 9

ORD6:35 pmChicago O'Hare Intl

7h 40m

LHR8:15 amLondon Heathrow

$580

Find similar

British Airways

Apr 20

LHR1:25 pmLondon Heathrow

11h 35m

1 stop

ORD7:00 pmChicago O'Hare Intl

May 5

ORD5:40 pmChicago O'Hare Intl

7h 40m

LHR7:20 amLondon Heathrow

$581

Find similar

Finnair flights from London to Chicago

Our best Finnair deals on London to Chicago flight tickets

Finnair

Dec 6

LHR12:35 pmLondon Heathrow

8h 50m

ORD3:25 pmChicago O'Hare Intl

Dec 10

ORD6:35 pmChicago O'Hare Intl

7h 40m

LHR8:15 amLondon Heathrow

$584

Find similar

Finnair

Mar 2

LHR2:10 pmLondon Heathrow

8h 50m

ORD5:00 pmChicago O'Hare Intl

Mar 10

ORD7:45 pmChicago O'Hare Intl

7h 50m

LHR8:35 amLondon Heathrow

$591

Find similar

Finnair

Jan 12

LHR2:10 pmLondon Heathrow

8h 50m

ORD5:00 pmChicago O'Hare Intl

Jan 19

ORD8:45 pmChicago O'Hare Intl

7h 40m

LHR10:25 amLondon Heathrow

$599

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 3/4

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 3/10

7:30 pm-10:55 am

1 stop10h 25m

$560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 12/9

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Tue 12/16

6:30 pm-7:30 pm

1 stop19h 00m

$564

LondonChicago

STN - ORD

STNORD

London Stansted

Sat 2/7

9:45 pm-4:55 pm

2 stops25h 10m

Chicago O'Hare Intl

Sun 2/15

7:10 pm-11:00 pm

2 stops21h 50m

$567

LondonChicago

LTN - ORD

LTNORD

London Luton

Sat 2/7

9:00 pm-4:55 pm

2 stops25h 55m

Chicago O'Hare Intl

Sun 2/15

7:10 pm-10:00 pm

2 stops20h 50m

$569

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 12/2

12:10 pm-5:55 pm

1 stop11h 45m

Chicago O'Hare Intl

Mon 12/8

6:35 pm-8:15 am

Nonstop7h 40m

$576

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/4

6:30 am-2:00 pm

1 stop13h 30m

Chicago O'Hare Intl

Tue 12/9

6:35 pm-8:15 am

Nonstop7h 40m

$580

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 12/6

7:50 am-2:00 pm

1 stop12h 10m

Chicago O'Hare Intl

Wed 12/17

3:50 pm-8:05 am

1 stop10h 15m

$583

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/4

6:40 am-4:45 pm

1 stop16h 05m

Chicago O'Hare Intl

Mon 12/8

7:20 pm-6:30 pm

1 stop17h 10m

$584

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/3

6:40 pm-4:45 pm

1 stop28h 05m

Chicago O'Hare Intl

Mon 12/8

7:20 pm-5:40 pm

1 stop16h 20m

$585

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 2/4

11:20 am-3:40 pm

2 stops34h 20m

Chicago O'Hare Intl

Sun 2/8

6:05 am-7:30 am

2 stops19h 25m

$589

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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 $579. If you’re not able to fly to Chicago in February, then September is your next best option. Flight prices from London to Chicago during September average around $583.

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 $889.

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 $904.

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 $697 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 November 2025, prices for London to Chicago flights are approximately 59% 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	$650
Fastest flight time	8h 25m
Direct flights	Every day
Airports in Chicago	1 airport

The best one-way flight to Chicago from London in the past 72 hours is $650. The best round-trip flight deal from London to Chicago found on momondo in the last 72 hours is $753.

The fastest flight from London to Chicago takes 8h 25m

Direct flights go from London to Chicago every day.

There is 1 airport near Chicago: 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 50m, 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 November 2025, 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 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 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 15%, Icelandair at 13%, 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 7.0 581 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.2 1,381 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,046 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.6 874 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $552	Free Cancellation	Rating 6.7 7,539 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 2,074 reviews	Search TAP AIR PORTUGAL flights
American Airlines	PriceFrom $572	Free Cancellation	Rating 7.2 11,038 reviews	Search American Airlines flights
Iberia	PriceFrom $599	Free Cancellation	Rating 7.0 3,034 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 7,594 reviews	Search Lufthansa flights

Austrian Airlines Flights From London to Chicago
Austrian Airlines flight deals from London to Chicago start from $530 round-trip. Over the 19 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 to Chicago
The best Finnair deal for London to Chicago flight tickets found on momondo in the last 72 hours was $625, 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 24 flights out of London into Chicago in an average week, so prices vary by time and availability. 1,334 Finnair reviews by users on momondo have scored the airline at 7.6/10.

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Hammond

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Saint Joseph

Portage

Lansing

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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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Cheap flights from London to Chicago from $536

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 12/3. 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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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 September is your next best option. Flight prices from London to Chicago during September average around $583.

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 $904.

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 November 2025, prices for London to Chicago flights are approximately 59% 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, United Airlines, and American 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 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 and Chicago?

Reykjavik (KEF) 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 $539.

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 November 2025, there are 32 flights per day flying from London to Chicago. The most common time of day flights depart is 12:00PM, with 67% of flights taking off in the afternoon.

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

228 flights are operational weekly from London to Chicago as of November 2025. The most popular departure day for this route is Mon, with 18% 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