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Cheap flights from London to Chicago from €478

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to Chicago departing on 13/9. 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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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London to Chicago.
Icelandair Logo
13:05 - 18:15LHR-ORD
11h 10m1 stop
Icelandair Logo
19:25 - 11:55ORD-LHR
10h 30m1 stop
€478Icelandair
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Sat, 13 Sep - Sat, 27 Sep
United Airlines Logo
08:40 - 15:55LHR-ORD
13h 15m1 stop
United Airlines Logo
07:35 - 07:40ORD-LHR
18h 05m1 stop
€478United Airlines
Find Deal
Fri, 9 May - Mon, 12 May
Lufthansa Logo
09:00 - 18:15LHR-ORD
15h 15m1 stop
Lufthansa Logo
16:05 - 06:20ORD-LHR
8h 15mdirect
€479Lufthansa
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Thu, 15 May - Mon, 19 May
SWISS Logo
20:05 - 12:55LHR-ORD
22h 50m1 stop
SWISS Logo
14:20 - 19:20ORD-LHR
23h 00m1 stop
€480SWISS
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Mon, 8 Sep - Tue, 16 Sep
Austrian Airlines Logo
19:30 - 13:20LHR-ORD
23h 50m1 stop
Austrian Airlines Logo
16:05 - 06:20ORD-LHR
8h 15mdirect
€481Austrian Airlines
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Sat, 3 May - Mon, 19 May
 Logo
06:30 - 12:55LHR-ORD
12h 25m1 stop
 Logo
14:20 - 07:55ORD-LHR
11h 35m1 stop
€484
Find Deal
Sun, 4 May - Sun, 11 May
 Logo
14:10 - 17:15LHR-ORD
9h 05mdirect
 Logo
14:20 - 07:55ORD-LHR
11h 35m1 stop
€509
Find Deal
Sun, 4 May - Sun, 11 May
Austrian Airlines Logo
16:40 - 18:26LHR-ORD
31h 46m1 stop
Austrian Airlines Logo
13:04 - 06:55ORD-LHR
11h 51m1 stop
€514Austrian Airlines
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Sun, 4 May - Thu, 22 May
SWISS Logo
06:00 - 12:10LHR-ORD
12h 10m1 stop
SWISS Logo
19:05 - 13:00ORD-LHR
11h 55m1 stop
€521SWISS
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Tue, 23 Sep - Mon, 6 Oct
Lufthansa Logo
07:25 - 13:55LHR-ORD
12h 30m1 stop
Lufthansa Logo
14:33 - 09:40ORD-LHR
13h 07m1 stop
€548Lufthansa
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Wed, 7 May - Sun, 25 May

Lufthansa flights from London to Chicago

Our best Lufthansa deals on London to Chicago flight tickets
Lufthansa
15 May
LHR09:00London Heathrow
15h 15m
1 stop
ORD18:15Chicago O'Hare Intl
19 May
ORD16:05Chicago O'Hare Intl
8h 15m
LHR06:20London Heathrow
Lufthansa
4 May
LHR06:30London Heathrow
12h 25m
1 stop
ORD12:55Chicago O'Hare Intl
19 May
ORD16:05Chicago O'Hare Intl
8h 15m
LHR06:20London Heathrow
Lufthansa
1 May
LHR08:30London Heathrow
9h 05m
ORD11:35Chicago O'Hare Intl
15 May
ORD16:05Chicago O'Hare Intl
8h 15m
LHR06:20London Heathrow

United Airlines flights from London to Chicago

Our best United Airlines deals on London to Chicago flight tickets
United Airlines
9 May
LHR08:40London Heathrow
13h 15m
1 stop
ORD15:55Chicago O'Hare Intl
12 May
ORD07:35Chicago O'Hare Intl
18h 05m
1 stop
LHR07:40London Heathrow
United Airlines
4 May
LHR06:30London Heathrow
12h 25m
1 stop
ORD12:55Chicago O'Hare Intl
11 May
ORD11:10Chicago O'Hare Intl
13h 45m
1 stop
LHR06:55London Heathrow
United Airlines
15 May
LHR06:30London Heathrow
12h 25m
1 stop
ORD12:55Chicago O'Hare Intl
22 May
ORD14:24Chicago O'Hare Intl
10h 31m
1 stop
LHR06:55London Heathrow

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 €503, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in February, then you should wait until March to fly from London, when ticket prices are also cheap, with an average price of €537.

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

On average, the least expensive day to fly to Chicago from London is on a Monday. momondo users have found tickets for Monday departures for as low as €0. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Thursday is €674.

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

At midday is the cheapest time of day to fly from London to Chicago when you can find flight prices for as low as €0. Flying to Chicago at midday is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are €648 on average. Flights to Chicago from London in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 13 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €643 when searching 13 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 €609 on momondo.

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

There are 1 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.

How have London to Chicago flight prices changed over time?

As of April 2025, prices for London to Chicago flights are approximately 38% 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

€531

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 €531. The best return flight deal from London to Chicago found on momondo in the last 72 hours is €478.
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?

    A flight from London to Chicago will travel around 6349.2 km. By plane, this route typically takes 8h 25m.

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

    Prices for flights from London to Chicago were last updated today.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Chicago.

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

    The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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


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 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?

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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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 25.6 km from Chicago