Which layover airport offers the lowest fares from London to Chicago O'Hare Intl Airport?

Flights via New York (JFK) offer the lowest average round-trip price of $547.

Which layover airport has the shortest connection time from London to Chicago O'Hare Intl Airport?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 18m.

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 O'Hare Intl Airport?

Dublin (DUB) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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.

How many flights depart from London to Chicago O'Hare Intl Airport on average per week?

As of December 2025, 270 flights take off from London and land in Chicago O'Hare Intl Airport each week. The most common flight departure day for this route is Tue, with 16% of weekly flights taking off on this day.

How many flights depart from London to Chicago O'Hare Intl Airport on average per day?

38 flights are operational daily from London to Chicago O'Hare Intl Airport as of December 2025. The most popular departure time for this route is 12:00PM, with 63% of flights per day taking off in the afternoon.

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 172 minutes.

Which layover airport has the shortest travel time from London to Chicago O'Hare Intl Airport?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 27m.

What is the cheapest airline that flies from London to Chicago O'Hare Intl?

JetBlue, Icelandair, and Lufthansa are the most popular carriers operating from London to Chicago O'Hare Intl

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.

What airlines fly to Chicago O'Hare Intl Airport?

British Airways, American Airlines and Aer Lingus are the top three most popular airlines that fly to Chicago O'Hare Intl Airport 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 O'Hare Intl Airport. Keep in mind that there are 10 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from London to Chicago O'Hare Intl Airport?

As of December 2025, there are 10 operators available to choose from for flights from London to Chicago O'Hare Intl Airport.

How old do you have to be to fly from London to Chicago O'Hare Intl Airport?

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 to Chicago O'Hare Intl Airport.

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport 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 O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$335 Cheap Flights from London to Chicago O'Hare Intl Airport in 2025/26

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6:40 am - 4:45 pm

LHR

ORD

16h 05m2 stops

7:20 pm - 4:25 pm

ORD

LHR

15h 05m2 stops

$549Scandinavian Airlines

Mon, Feb 16 - Thu, Feb 26

6:40 am - 4:45 pm

LHR

ORD

16h 05m2 stops

7:20 pm - 4:00 pm

ORD

LHR

14h 40m1 stop

$553Scandinavian Airlines

Mon, Feb 16 - Mon, Feb 23

10:35 am - 4:55 pm

LHR

ORD

36h 20m2 stops

7:20 pm - 4:25 pm

ORD

LHR

15h 05m2 stops

$554Scandinavian Airlines

Sat, Jan 24 - Sat, Feb 7

12:10 pm - 6:55 pm

LHR

ORD

11h 45m1 stop

6:10 pm - 6:55 am

ORD

LHR

7h 45mnonstop

$555British Airways

Mon, Mar 9 - Sun, Mar 22

8:50 am - 2:00 pm

LHR

ORD

11h 10m1 stop

4:16 pm - 9:10 am

ORD

LHR

10h 54m1 stop

$557British Airways

Wed, Apr 29 - Thu, May 7

11:20 am - 11:15 pm

LGW

ORD

17h 55m1 stop

2:31 pm - 9:00 am

ORD

LGW

12h 29m1 stop

$557American Airlines

Sat, Feb 21 - Sat, Feb 28

11:55 am - 5:20 pm

LGW

ORD

11h 25m1 stop

7:30 pm - 10:55 am

ORD

LGW

10h 25m1 stop

$558Icelandair

Fri, Feb 20 - Thu, Mar 19

11:55 am - 5:20 pm

LGW

ORD

11h 25m1 stop

6:30 pm - 10:55 am

ORD

LGW

10h 25m1 stop

$560Icelandair

Mon, Mar 2 - Fri, Mar 6

6:00 am - 1:20 pm

LHR

ORD

13h 20m1 stop

6:10 pm - 8:30 am

ORD

LHR

8h 20mnonstop

$560Austrian Airlines

Fri, Apr 24 - Mon, Apr 27

11:20 am - 11:15 pm

LGW

ORD

17h 55m1 stop

10:28 am - 9:00 am

ORD

LGW

16h 32m2 stops

$561American Airlines

Sat, Feb 21 - Sat, Feb 28

TAP AIR PORTUGAL flights from London to Chicago O'Hare Intl Airport

Our best TAP AIR PORTUGAL deals on London to Chicago O'Hare Intl Airport flight tickets

TAP AIR PORTUGAL

Mar 31

LGW9:15 pmLondon Gatwick

24h 45m

2 stops

ORD4:00 pmChicago O'Hare Intl

Apr 12

ORD6:00 pmChicago O'Hare Intl

15h 10m

1 stop

LGW3:10 pmLondon Gatwick

$612

Find similar

TAP AIR PORTUGAL

Jan 13

LGW9:20 pmLondon Gatwick

23h 40m

2 stops

ORD3:00 pmChicago O'Hare Intl

Jan 16

ORD8:15 pmChicago O'Hare Intl

13h 30m

1 stop

LGW3:45 pmLondon Gatwick

$744

Find similar

Finnair flights from London to Chicago O'Hare Intl Airport

Our best Finnair deals on London to Chicago O'Hare Intl Airport flight tickets

Finnair

Apr 13

LGW12:20 pmLondon Gatwick

35h 40m

2 stops

ORD6:00 pmChicago O'Hare Intl

Apr 23

ORD12:59 pmChicago O'Hare Intl

15h 41m

1 stop

LGW10:40 amLondon Gatwick

$564

Find similar

Finnair

Jan 12

LHR3:35 pmLondon Heathrow

23h 19m

2 stops

ORD8:54 amChicago O'Hare Intl

Jan 19

ORD7:20 amChicago O'Hare Intl

17h 40m

2 stops

LHR7:00 amLondon Heathrow

$601

Find similar

Finnair

Jan 13

LHR12:35 pmLondon Heathrow

8h 50m

ORD3:25 pmChicago O'Hare Intl

Jan 17

ORD5:25 pmChicago O'Hare Intl

31h 35m

1 stop

LHR7:00 amLondon Heathrow

$611

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from London to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 2/16

6:40 am-4:45 pm

2 stops16h 05m

Chicago O'Hare Intl

Thu 2/26

7:20 pm-4:25 pm

2 stops15h 05m

$549

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 2/16

6:40 am-4:45 pm

2 stops16h 05m

Chicago O'Hare Intl

Mon 2/23

7:20 pm-4:00 pm

1 stop14h 40m

$553

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 1/24

10:35 am-4:55 pm

2 stops36h 20m

Chicago O'Hare Intl

Sat 2/7

7:20 pm-4:25 pm

2 stops15h 05m

$554

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 3/9

12:10 pm-6:55 pm

1 stop11h 45m

Chicago O'Hare Intl

Sun 3/22

6:10 pm-6:55 am

Nonstop7h 45m

$555

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/29

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Thu 5/7

4:16 pm-9:10 am

1 stop10h 54m

$557

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 2/21

11:20 am-11:15 pm

1 stop17h 55m

Chicago O'Hare Intl

Sat 2/28

2:31 pm-9:00 am

1 stop12h 29m

$557

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 2/20

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Thu 3/19

7:30 pm-10:55 am

1 stop10h 25m

$558

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 3/2

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

$560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 4/24

6:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Mon 4/27

6:10 pm-8:30 am

Nonstop8h 20m

$560

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 2/21

11:20 am-11:15 pm

1 stop17h 55m

Chicago O'Hare Intl

Sat 2/28

10:28 am-9:00 am

2 stops16h 32m

$561

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to Chicago O'Hare Intl Airport

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 O'Hare Intl Airport?

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from London averaging around $595.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $771. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from London because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $882.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from London in the morning is the least expensive time of day to depart. momondo users have found prices as low as $818 when looking at flights departing in the morning. Try not to purchase tickets in the afternoon because they tend to be around $914. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest London to Chicago O'Hare Intl flight route?

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

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $727 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from London for as low as $696 on momondo.

What cabin class options are available on London to Chicago O'Hare Intl flights?

There are 4 cabin classes available to choose from on London to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have London to Chicago O'Hare Intl Airport flight prices changed over time?

As of December 2025, prices for London to Chicago O'Hare Intl Airport flights are approximately 20% more expensive when compared to flights at the same time last year.

When to book flights from London to Chicago O'Hare Intl Airport

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

Estimated round-trip price

Cheap London to Chicago O'Hare Intl Airport (LON to ORD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago O'Hare Intl Airport

Best Price Found	$662
Fastest flight time	8h 40m
Direct flights	Every day

The best one-way flight to Chicago O'Hare Intl Airport from London in the past 72 hours is $662. The best round-trip flight deal from London to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $766.

The fastest flight from London to Chicago O'Hare Intl Airport takes 8h 40m

Direct flights go from London to Chicago O'Hare Intl Airport every day.

Search flight deals

How far is London to Chicago O'Hare Intl by plane?
A flight from London to Chicago O'Hare Intl will travel around 3950.9 mi. Flights usually cover this in 8h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to Chicago O'Hare Intl Airport?
Prices for flights from London to Chicago O'Hare Intl Airport are updated daily.
How many operators does momondo search for flights from London to Chicago O'Hare Intl Airport?
As of December 2025, there are 10 operators available to choose from for flights from London to Chicago O'Hare Intl Airport.
How old do you have to be to fly from London to Chicago O'Hare Intl Airport?
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 to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport 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 O'Hare Intl Airport. 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 to Chicago O'Hare Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from London to Chicago O'Hare Intl Airport is Boeing 767-300, representing 31.76% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 22.21%, Boeing 777 at 11.73%, and Boeing 787-10 Dreamliner at 10.31%.
What is the most popular airline from London to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between London and Chicago O'Hare Intl Airport, the leading airline is British Airways, making up 47% of the total bookings. Other popular airlines include Icelandair with 17%, United Airlines with 16%, and American Airlines with 8%.

Best airlines flying from London to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from London to Chicago O'Hare Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.2 1,416 reviews	Search Aer Lingus flights
Icelandair	PriceFrom $451	Free Cancellation	Rating 7.1 593 reviews	Search Icelandair flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,124 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.5 886 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $552	Free Cancellation	Rating 6.7 7,631 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 2,101 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $558	Free Cancellation	Rating 7.0 3,058 reviews	Search Iberia flights
American Airlines	PriceFrom $572	Free Cancellation	Rating 7.2 11,069 reviews	Search American Airlines flights
Finnair	PriceFrom $576	Free Cancellation	Rating 7.6 1,343 reviews	Search Finnair flights
Lufthansa	PriceFrom $720	Free Cancellation	Rating 6.8 7,671 reviews	Search Lufthansa flights

Finnair Flights From London to Chicago O'Hare Intl Airport
Finnair flies from London to Chicago O'Hare Intl Airport around 28 times per week, with 1,343 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London to Chicago O'Hare Intl Airport in the last 72 hours was $576 (round-trip), much lower than the average airfare cost of $750 for Finnair flights on this route.
Austrian Airlines Flights From London to Chicago O'Hare Intl Airport
Across 886 Austrian Airlines reviews on momondo, the average score is 7.5/10. Austrian Airlines flies from London to Chicago O'Hare Intl Airport about 16 times each week, with ticket deals ranging from $530 to $897. Price data is based on momondo searches in the last 72 hours.

Lake Geneva

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South Haven

Rockford

Merrillville

Gurnee

Rosemont

Naperville

Kenosha

New Buffalo

Joliet

Oak Brook

Orland Park

Racine

Hammond

Janesville

Tinley Park

Elgin

Aurora

South Holland

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Chicago for you.

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

Yes. momondo allows you to filter the results for London to Chicago flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Chicago?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight 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?

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 $497

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 2/2. 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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TAP AIR PORTUGAL flights from London to Chicago O'Hare Intl Airport

Our best TAP AIR PORTUGAL deals on London to Chicago O'Hare Intl Airport flight tickets

Finnair flights from London to Chicago O'Hare Intl Airport

Our best Finnair deals on London to Chicago O'Hare Intl Airport flight tickets

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Use the filters below to find and compare flights from London to Chicago O'Hare Intl Airport that are best for you.

See travel insights to Chicago from

How to get the cheapest flight ticket from London to Chicago O'Hare Intl Airport

What is the typical price of a round-trip flight between London and Chicago O'Hare Intl Airport?

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from London averaging around $595.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest London to Chicago O'Hare Intl flight route?

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

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

What cabin class options are available on London to Chicago O'Hare Intl flights?

There are 4 cabin classes available to choose from on London to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have London to Chicago O'Hare Intl Airport flight prices changed over time?

As of December 2025, prices for London to Chicago O'Hare Intl Airport flights are approximately 20% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from London to Chicago O'Hare Intl?

JetBlue, Icelandair, and Lufthansa are the most popular carriers operating from London to Chicago O'Hare Intl

What airlines fly to Chicago O'Hare Intl Airport?

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 172 minutes.

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

Generally, flights departing at night tend to experience fewer delays. Flights 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 O'Hare Intl Airport?

Dublin (DUB) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from London to Chicago O'Hare Intl Airport?

Flights via New York (JFK) offer the lowest average round-trip price of $547.

Which layover airport has the shortest travel time from London to Chicago O'Hare Intl Airport?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 27m.

Which layover airport has the shortest connection time from London to Chicago O'Hare Intl Airport?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 18m.

How many flights depart from London to Chicago O'Hare Intl Airport on average per day?

38 flights are operational daily from London to Chicago O'Hare Intl Airport as of December 2025. The most popular departure time for this route is 12:00PM, with 63% of flights per day taking off in the afternoon.

How many flights depart from London to Chicago O'Hare Intl Airport on average per week?

As of December 2025, 270 flights take off from London and land in Chicago O'Hare Intl Airport each week. The most common flight departure day for this route is Tue, with 16% of weekly flights taking off on this day.

When to book flights from London to Chicago O'Hare Intl Airport

Cheap London to Chicago O'Hare Intl Airport (LON to ORD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago O'Hare Intl Airport

Best Price Found

Fastest flight time

Direct flights

How far is London to Chicago O'Hare Intl by plane?

When did momondo last update prices for flights from London to Chicago O'Hare Intl Airport?

How many operators does momondo search for flights from London to Chicago O'Hare Intl Airport?

How old do you have to be to fly from London to Chicago O'Hare Intl Airport?

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

What is the most popular plane model from London to Chicago O'Hare Intl Airport?

What is the most popular airline from London to Chicago O'Hare Intl Airport?

Best airlines flying from London to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from London to Chicago O'Hare Intl Airport with momondo

Finnair Flights From London to Chicago O'Hare Intl Airport

Austrian Airlines Flights From London to Chicago O'Hare Intl Airport

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?