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Cheap flights from London to Chicago from $527

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 12/23. 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 round-trip flights

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Multiple Airlines Logo
2:00 pm - 9:44 amLGW-ORD
25h 44m2 stops
Multiple Airlines Logo
10:18 am - 10:05 amORD-LGW
17h 47m1 stop
$532Multiple Airlines
Find Deal
Thu, Jan 22 - Sat, Jan 24
Scandinavian Airlines Logo
7:05 am - 4:45 pmLHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
7:20 pm - 9:20 amORD-LHR
32h 00m1 stop
$532Scandinavian Airlines
Find Deal
Mon, Nov 17 - Fri, Feb 6
TAP AIR PORTUGAL Logo
2:50 pm - 4:00 pmLGW-ORD
31h 10m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 3:40 pmORD-LGW
15h 40m1 stop
$541TAP AIR PORTUGAL
Find Deal
Thu, Apr 16 - Fri, May 1
Icelandair Logo
11:55 am - 5:20 pmLGW-ORD
11h 25m1 stop
Icelandair Logo
6:30 pm - 10:55 amORD-LGW
10h 25m1 stop
$546Icelandair
Find Deal
Mon, Jan 19 - Tue, Feb 3
TAP AIR PORTUGAL Logo
6:30 pm - 3:00 pmLHR-ORD
26h 30m1 stop
TAP AIR PORTUGAL Logo
7:10 pm - 3:30 pmORD-LHR
14h 20m1 stop
$551TAP AIR PORTUGAL
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Tue, Nov 25 - Wed, Dec 3
Icelandair Logo
11:55 am - 5:20 pmLGW-ORD
11h 25m1 stop
Icelandair Logo
6:30 pm - 10:55 amORD-LGW
10h 25m1 stop
$552Icelandair
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Wed, Jan 7 - Mon, Jan 19
SWISS Logo
9:15 am - 4:20 pmLCY-ORD
13h 05m1 stop
SWISS Logo
6:50 pm - 12:55 pmORD-LCY
12h 05m1 stop
$647SWISS
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Tue, Nov 25 - Tue, Dec 2
SWISS Logo
7:10 pm - 12:45 pmLCY-ORD
23h 35m1 stop
SWISS Logo
4:10 pm - 12:55 pmORD-LCY
14h 45m1 stop
$673SWISS
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Tue, Nov 25 - Mon, Dec 1
Virgin Atlantic Logo
6:55 pm - 2:20 pmLCY-ORD
25h 25m1 stop
Virgin Atlantic Logo
10:45 am - 8:50 amORD-LCY
16h 05m2 stops
$731Virgin Atlantic
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Tue, Nov 25 - Tue, Dec 2
Virgin Atlantic Logo
9:20 am - 2:20 pmLCY-ORD
11h 00m1 stop
Virgin Atlantic Logo
10:35 am - 7:15 amORD-LCY
14h 40m2 stops
$739Virgin Atlantic
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Mon, Jan 19 - Tue, Feb 3

Scandinavian Airlines flights from London to Chicago O'Hare Intl Airport

Our best Scandinavian Airlines deals on London to Chicago O'Hare Intl Airport flight tickets
Scandinavian Airlines
Nov 17
LHR7:05 amLondon Heathrow
15h 40m
2 stops
ORD4:45 pmChicago O'Hare Intl
Feb 6
ORD7:20 pmChicago O'Hare Intl
32h 00m
1 stop
LHR9:20 amLondon Heathrow
$532
Find similar
Scandinavian Airlines
Nov 13
LHR6:40 amLondon Heathrow
16h 05m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 23
ORD7:20 pmChicago O'Hare Intl
14h 40m
1 stop
LHR4:00 pmLondon Heathrow
$533
Find similar
Scandinavian Airlines
Nov 19
LHR10:20 amLondon Heathrow
12h 25m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 26
ORD7:20 pmChicago O'Hare Intl
15h 05m
2 stops
LHR4:25 pmLondon Heathrow
$534
Find similar

Icelandair flights from London to Chicago O'Hare Intl Airport

Our best Icelandair deals on London to Chicago O'Hare Intl Airport flight tickets
Icelandair
Jan 19
LGW11:55 amLondon Gatwick
11h 25m
1 stop
ORD5:20 pmChicago O'Hare Intl
Feb 3
ORD6:30 pmChicago O'Hare Intl
10h 25m
1 stop
LGW10:55 amLondon Gatwick
$546
Find similar
Icelandair
Nov 4
LGW11:55 amLondon Gatwick
11h 25m
1 stop
ORD5:20 pmChicago O'Hare Intl
Jan 12
ORD6:30 pmChicago O'Hare Intl
10h 25m
1 stop
LGW10:55 amLondon Gatwick
$547
Find similar
Icelandair
Nov 4
LHR12:15 pmLondon Heathrow
11h 05m
1 stop
ORD5:20 pmChicago O'Hare Intl
Jan 12
ORD6:30 pmChicago O'Hare Intl
10h 20m
1 stop
LHR10:50 amLondon Heathrow
$551
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momondo Fare Finder

 
Customize your flight search to find flights from London to Chicago O'Hare Intl Airport 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 832,500 searches. Data last updated October 30, 2025.
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

LGW - ORD

LGWORD

London Gatwick

Thu 1/22

2:00 pm-9:44 am

2 stops25h 44m

Chicago O'Hare Intl

Sat 1/24

10:18 am-10:05 am

1 stop17h 47m

$532

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 11/17

7:05 am-4:45 pm

2 stops15h 40m

Chicago O'Hare Intl

Fri 2/6

7:20 pm-9:20 am

1 stop32h 00m

$532

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 4/16

2:50 pm-4:00 pm

1 stop31h 10m

Chicago O'Hare Intl

Fri 5/1

6:00 pm-3:40 pm

1 stop15h 40m

$541

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 1/19

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 2/3

6:30 pm-10:55 am

1 stop10h 25m

$546

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 11/25

6:30 pm-3:00 pm

1 stop26h 30m

Chicago O'Hare Intl

Wed 12/3

7:10 pm-3:30 pm

1 stop14h 20m

$551

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 1/7

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Mon 1/19

6:30 pm-10:55 am

1 stop10h 25m

$552

LondonChicago

LCY - ORD

LCYORD

London City

Tue 11/25

9:15 am-4:20 pm

1 stop13h 05m

Chicago O'Hare Intl

Tue 12/2

6:50 pm-12:55 pm

1 stop12h 05m

$647

LondonChicago

LCY - ORD

LCYORD

London City

Tue 11/25

7:10 pm-12:45 pm

1 stop23h 35m

Chicago O'Hare Intl

Mon 12/1

4:10 pm-12:55 pm

1 stop14h 45m

$673

LondonChicago

LCY - ORD

LCYORD

London City

Tue 11/25

6:55 pm-2:20 pm

1 stop25h 25m

Chicago O'Hare Intl

Tue 12/2

10:45 am-8:50 am

2 stops16h 05m

$731

LondonChicago

LCY - ORD

LCYORD

London City

Mon 1/19

9:20 am-2:20 pm

1 stop11h 00m

Chicago O'Hare Intl

Tue 2/3

10:35 am-7:15 am

2 stops14h 40m

$739

Flights are sorted by cheapest round-trip 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 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

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 $600.

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 $779. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday 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 $889.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $695 when looking at flights departing in the evening. Try not to purchase tickets in the afternoon because they tend to be around $920. 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 $732 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 $693 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.

Can stopping save me money on London to Chicago O'Hare Intl Airport flights?

You could potentially save up to 2% on your flight if you consider stops on a London to Chicago O'Hare Intl Airport flight.

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

As of October 2025, prices for London to Chicago O'Hare Intl Airport flights are approximately 11% 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

$594

Fastest flight time

8h 25m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from London in the past 72 hours is $594. The best round-trip flight deal from London to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $717.
The fastest flight from London to Chicago O'Hare Intl Airport takes 8h 25m
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 11h 00m, 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?

  • 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?

  • 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
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $390Free CancellationRating
7.1
562 reviews
Search Icelandair flights
Aer LingusPriceFrom $446Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
8,999 reviews
Search United Airlines flights
Austrian AirlinesPriceFrom $530Free CancellationRating
7.6
862 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $553Free CancellationRating
6.7
7,488 reviews
Search British Airways flights
TAP AIR PORTUGALPriceFrom $558Free CancellationRating
7.1
2,040 reviews
Search TAP AIR PORTUGAL flights
American AirlinesPriceFrom $572Free CancellationRating
7.2
11,034 reviews
Search American Airlines flights
IberiaPriceFrom $599Free CancellationRating
7.0
3,004 reviews
Search Iberia flights
FinnairPriceFrom $626Free CancellationRating
7.6
1,333 reviews
Search Finnair flights
Brussels AirlinesPriceFrom $633Free CancellationRating
7.2
369 reviews
Search Brussels Airlines flights

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

    Austrian Airlines flies from London to Chicago O'Hare Intl Airport around 10 times per week, with 862 momondo users rating the airline 7.6/10. The cheapest Austrian Airlines deal from London to Chicago O'Hare Intl Airport in the last 72 hours was $530 (round-trip), much lower than the average airfare cost of $897 for Austrian Airlines flights on this route.

  • Finnair Flights From London to Chicago O'Hare Intl Airport

    Across 1,333 Finnair reviews on momondo, the average score is 7.6/10. Finnair flies from London to Chicago O'Hare Intl Airport about 16 times each week, with ticket deals ranging from $626 to $852. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
South Haven
Schaumburg
Rockford
Merrillville
Gurnee
Naperville
Rosemont
Kenosha
New Buffalo
Joliet
Oak Brook
Orland Park
Racine
Hammond
Tinley Park
Janesville
Aurora
Elgin
Benton Harbor

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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