Cheap flights from London to Chicago from £403

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 7/12. 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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Scandinavian Airlines Logo
07:05 - 16:45LHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
19:20 - 17:40ORD-LHR
16h 20m1 stop
£407Scandinavian Airlines
Find Deal
Wed, 26 Nov - Wed, 31 Dec
Scandinavian Airlines Logo
07:05 - 16:45LHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
£408Scandinavian Airlines
Find Deal
Thu, 11 Dec - Wed, 4 Feb
United Airlines Logo
13:45 - 16:20LHR-ORD
32h 35m1 stop
United Airlines Logo
15:55 - 06:30ORD-LHR
32h 35m1 stop
£414United Airlines
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Thu, 4 Dec - Sat, 6 Dec
Icelandair Logo
11:55 - 17:20LGW-ORD
11h 25m1 stop
Icelandair Logo
22:40 - 14:40ORD-LGW
10h 00m1 stop
£415Icelandair
Find Deal
Fri, 27 Feb - Tue, 30 Jun
Icelandair Logo
11:55 - 17:20LGW-ORD
11h 25m1 stop
Icelandair Logo
18:30 - 10:55ORD-LGW
10h 25m1 stop
£418Icelandair
Find Deal
Tue, 25 Nov - Tue, 2 Dec
United Airlines Logo
18:00 - 09:13LHR-ORD
21h 13m1 stop
United Airlines Logo
15:45 - 05:55ORD-LHR
8h 10mdirect
£443United Airlines
Find Deal
Sat, 6 Dec - Sun, 7 Dec
TAP AIR PORTUGAL Logo
21:15 - 16:00LGW-ORD
24h 45m2 stops
TAP AIR PORTUGAL Logo
18:15 - 09:45ORD-LGW
33h 30m1 stop
£465TAP AIR PORTUGAL
Find Deal
Sat, 2 May - Sat, 9 May
TAP AIR PORTUGAL Logo
10:45 - 14:45LGW-ORD
58h 00m2 stops
TAP AIR PORTUGAL Logo
20:25 - 15:45ORD-LGW
13h 20m1 stop
£467TAP AIR PORTUGAL
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Fri, 21 Nov - Sun, 30 Nov
Lufthansa Logo
09:50 - 20:05LCY-ORD
16h 15m1 stop
Lufthansa Logo
17:20 - 17:35ORD-LCY
19h 15m1 stop
£543Lufthansa
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Wed, 4 Mar - Tue, 10 Mar
Lufthansa Logo
09:50 - 20:05LCY-ORD
16h 15m1 stop
Lufthansa Logo
17:20 - 17:35ORD-LCY
19h 15m1 stop
£545Lufthansa
Find Deal
Wed, 4 Mar - Tue, 10 Mar

Scandinavian Airlines flights from London to Chicago

Our best Scandinavian Airlines deals on London to Chicago flight tickets
Scandinavian Airlines
26 Nov
LHR07:05London Heathrow
15h 40m
2 stops
ORD16:45Chicago O'Hare Intl
31 Dec
ORD19:20Chicago O'Hare Intl
16h 20m
1 stop
LHR17:40London Heathrow
Scandinavian Airlines
11 Dec
LHR07:05London Heathrow
15h 40m
2 stops
ORD16:45Chicago O'Hare Intl
4 Feb
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow
Scandinavian Airlines
7 Feb
LHR06:40London Heathrow
16h 05m
2 stops
ORD16:45Chicago O'Hare Intl
14 Feb
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow

Icelandair flights from London to Chicago

Our best Icelandair deals on London to Chicago flight tickets
Icelandair
27 Feb
LGW11:55London Gatwick
11h 25m
1 stop
ORD17:20Chicago O'Hare Intl
30 Jun
ORD22:40Chicago O'Hare Intl
10h 00m
1 stop
LGW14:40London Gatwick
Icelandair
25 Nov
LGW11:55London Gatwick
11h 25m
1 stop
ORD17:20Chicago O'Hare Intl
2 Dec
ORD18:30Chicago O'Hare Intl
10h 25m
1 stop
LGW10:55London Gatwick
Icelandair
8 Dec
LGW11:55London Gatwick
11h 25m
1 stop
ORD17:20Chicago O'Hare Intl
17 Dec
ORD18:30Chicago O'Hare Intl
10h 25m
1 stop
LGW10:55London Gatwick

momondo Fare Finder

 
Customise your flight search to find flights from London to Chicago that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 11 November 2025.
Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 26/11

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Wed 31/12

19:20-17:40

1 stop16h 20m

£407

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/12

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Wed 4/2

19:20-16:25

2 stops15h 05m

£408

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/12

13:45-16:20

1 stop32h 35m

Chicago O'Hare Intl

Sat 6/12

15:55-06:30

1 stop32h 35m

£414

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 27/2

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Tue 30/6

22:40-14:40

1 stop10h 00m

£415

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 25/11

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Tue 2/12

18:30-10:55

1 stop10h 25m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 6/12

18:00-09:13

1 stop21h 13m

Chicago O'Hare Intl

Sun 7/12

15:45-05:55

Nonstop8h 10m

£443

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 2/5

21:15-16:00

2 stops24h 45m

Chicago O'Hare Intl

Sat 9/5

18:15-09:45

1 stop33h 30m

£465

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 21/11

10:45-14:45

2 stops58h 00m

Chicago O'Hare Intl

Sun 30/11

20:25-15:45

1 stop13h 20m

£467

LondonChicago

LCY - ORD

LCYORD

London City

Wed 4/3

09:50-20:05

1 stop16h 15m

Chicago O'Hare Intl

Tue 10/3

17:20-17:35

1 stop19h 15m

£543

LondonChicago

LCY - ORD

LCYORD

London City

Wed 4/3

09:50-20:05

1 stop16h 15m

Chicago O'Hare Intl

Tue 10/3

17:20-17:35

1 stop19h 15m

£545

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 cheapest month to fly to Chicago?

The cheapest month to fly to Chicago from London is in February. Flight prices, which tend to average around £439, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Chicago from London during September instead. Flights to Chicago in September, while not as cheap as those in February, still average around £442.

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 £625. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Chicago is Saturday, with ticket prices averaging around £684.

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

Flying to Chicago from London in the evening is the least expensive time of day to depart. momondo users have found prices as low as £510 when looking at flights departing in the evening. Flights in the afternoon are often more expensive, with an average ticket price of £685.

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 £555 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London for as low as £524 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 11% 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 November 2025, prices for London to Chicago flights are approximately 58% 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 return 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

£457

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 £457. The best return flight deal from London to Chicago found on momondo in the last 72 hours is £579.
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)
  • How far is London to Chicago by plane?

    The distance between London and Chicago is about 3945.2 mi. In terms of flight time, this usually takes a little over 11h 00m.

  • 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?

  • 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 required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • 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
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £320Free CancellationRating
7.1
578 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £352Free CancellationRating
7.5
673 reviews
Search Virgin Atlantic flights
Scandinavian AirlinesPriceFrom £367Free CancellationRating
7.4
1,570 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom £376Free CancellationRating
7.1
2,057 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom £377Free CancellationRating
7.2
1,368 reviews
Search Aer Lingus flights
Brussels AirlinesPriceFrom £394Free CancellationRating
7.2
369 reviews
Search Brussels Airlines flights
LufthansaPriceFrom £404Free CancellationRating
6.8
7,565 reviews
Search Lufthansa flights
British AirwaysPriceFrom £412Free CancellationRating
6.7
7,510 reviews
Search British Airways flights
Austrian AirlinesPriceFrom £412Free CancellationRating
7.6
864 reviews
Search Austrian Airlines flights
United AirlinesPriceFrom £416Free CancellationRating
7.4
9,012 reviews
Search United Airlines flights
  • Austrian Airlines Flights From London to Chicago

    Austrian Airlines operates around 16 flights from London to Chicago every week. The average price of these flights found in the last 72 hours has been £614, but momondo users have found Austrian Airlines deals from London to Chicago from as low as £412 round-trip. Austrian Airlines has been scored 7.6/10 in 864 reviews.

  • Finnair Flights From London to Chicago

    Finnair (7.6/10 from 1,335 reviews) operates around 21 flights from London to Chicago in any given week. The average Finnair airfare for this route is around £572, with deals from around £435 rare but found on momondo. Referenced prices are for round-trip London to Chicago flight searches in the last 72 hours.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from London.

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

Flights from London to Chicago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential London to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?

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

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1 adult
Thu 11/12
Thu 18/12

Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago