Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to Chicago from £344

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 Heathrow Airport to Chicago departing on 24/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London Heathrow Airport to Chicago

Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
12:15 - 17:20
LHR
-
ORD
11h 05m
1 stop
Icelandair Logo
18:30 - 10:50
ORD
-
LHR
10h 20m
1 stop
£384Icelandair
Thu, 19 Feb - Mon, 23 Feb
Icelandair Logo
20:35 - 18:20
LHR
-
ORD
26h 45m
1 stop
Icelandair Logo
19:25 - 11:55
ORD
-
LHR
10h 30m
1 stop
£386Icelandair
Wed, 11 Mar - Wed, 29 Apr
Austrian Airlines Logo
06:00 - 15:00
LHR
-
ORD
14h 00m
1 stop
Austrian Airlines Logo
14:30 - 10:50
ORD
-
LHR
15h 20m
1 stop
£387Austrian Airlines
Fri, 13 Mar - Fri, 20 Mar
British Airways Logo
08:50 - 20:04
LHR
-
ORD
17h 14m
2 stops
British Airways Logo
17:45 - 10:20
ORD
-
LHR
10h 35m
1 stop
£389British Airways
Mon, 9 Feb - Mon, 27 Apr
Multiple Airlines Logo
20:05 - 12:45
LHR
-
ORD
22h 40m
1 stop
Multiple Airlines Logo
15:45 - 05:55
ORD
-
LHR
8h 10mdirect
£390Multiple Airlines
Wed, 18 Feb - Tue, 24 Feb
Icelandair Logo
12:15 - 18:20
LHR
-
ORD
11h 05m
1 stop
Icelandair Logo
19:25 - 11:55
ORD
-
LHR
10h 30m
1 stop
£390Icelandair
Mon, 9 Mar - Fri, 1 May
Multiple Airlines Logo
06:00 - 12:45
LHR
-
ORD
12h 45m
1 stop
Multiple Airlines Logo
17:50 - 07:55
ORD
-
LHR
8h 05mdirect
£391Multiple Airlines
Sat, 7 Feb - Sun, 22 Feb
Icelandair Logo
20:35 - 18:20
LHR
-
ORD
26h 45m
1 stop
Icelandair Logo
19:25 - 20:20
ORD
-
LHR
18h 55m
1 stop
£392Icelandair
Sun, 8 Mar - Sat, 2 May
Scandinavian Airlines Logo
06:40 - 17:45
LHR
-
ORD
16h 05m
1 stop
Scandinavian Airlines Logo
20:20 - 21:40
ORD
-
LHR
20h 20m
1 stop
£392Scandinavian Airlines
Thu, 12 Mar - Thu, 19 Mar
Scandinavian Airlines Logo
07:05 - 17:45
LHR
-
ORD
15h 40m
2 stops
Scandinavian Airlines Logo
20:20 - 21:40
ORD
-
LHR
20h 20m
1 stop
£393Scandinavian Airlines
Thu, 12 Mar - Thu, 19 Mar

United Airlines flights from London Heathrow Airport to Chicago O'Hare Intl Airport

Our best United Airlines deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
United Airlines
13 Mar
LHR14:50London Heathrow
29h 10m
1 stop
ORD15:00Chicago O'Hare Intl
20 Mar
ORD14:30Chicago O'Hare Intl
15h 20m
1 stop
LHR10:50London Heathrow
£400
United Airlines
19 Feb
LHR08:30London Heathrow
12h 50m
1 stop
ORD15:20Chicago O'Hare Intl
23 Feb
ORD21:15Chicago O'Hare Intl
8h 00m
LHR11:15London Heathrow
£403
United Airlines
7 Mar
LHR07:30London Heathrow
16h 58m
2 stops
ORD18:28Chicago O'Hare Intl
13 Mar
ORD21:15Chicago O'Hare Intl
32h 35m
1 stop
LHR10:50London Heathrow
£408

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

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
TAP AIR PORTUGAL
28 Jan
LHR06:00London Heathrow
15h 00m
1 stop
ORD15:00Chicago O'Hare Intl
4 Feb
ORD19:10Chicago O'Hare Intl
21h 30m
1 stop
LHR22:40London Heathrow
£390
TAP AIR PORTUGAL
1 May
LHR08:00London Heathrow
14h 00m
1 stop
ORD16:00Chicago O'Hare Intl
10 May
ORD18:00Chicago O'Hare Intl
12h 45m
1 stop
LHR12:45London Heathrow
£408

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 279,928 searches. Data last updated 28 January 2026.
Use the filters below to find and compare flights from London Heathrow Airport 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

Thu 19/2

12:15-17:20

1 stop11h 05m

Chicago O'Hare Intl

Mon 23/2

18:30-10:50

1 stop10h 20m

£384

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 11/3

20:35-18:20

1 stop26h 45m

Chicago O'Hare Intl

Wed 29/4

19:25-11:55

1 stop10h 30m

£386

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/3

06:00-15:00

1 stop14h 00m

Chicago O'Hare Intl

Fri 20/3

14:30-10:50

1 stop15h 20m

£387

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/2

08:50-20:04

2 stops17h 14m

Chicago O'Hare Intl

Mon 27/4

17:45-10:20

1 stop10h 35m

£389

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 18/2

20:05-12:45

1 stop22h 40m

Chicago O'Hare Intl

Tue 24/2

15:45-05:55

Nonstop8h 10m

£390

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/3

12:15-18:20

1 stop11h 05m

Chicago O'Hare Intl

Fri 1/5

19:25-11:55

1 stop10h 30m

£390

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

06:00-12:45

1 stop12h 45m

Chicago O'Hare Intl

Sun 22/2

17:50-07:55

Nonstop8h 05m

£391

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 8/3

20:35-18:20

1 stop26h 45m

Chicago O'Hare Intl

Sat 2/5

19:25-20:20

1 stop18h 55m

£392

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/3

06:40-17:45

1 stop16h 05m

Chicago O'Hare Intl

Thu 19/3

20:20-21:40

1 stop20h 20m

£392

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/3

07:05-17:45

2 stops15h 40m

Chicago O'Hare Intl

Thu 19/3

20:20-21:40

1 stop20h 20m

£393

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Chicago from

How to get the cheapest flight ticket from London Heathrow Airport 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 typical price of a round-trip flight between London Heathrow Airport and Chicago O'Hare Intl Airport?

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

The cheapest month to fly to Chicago O'Hare Intl Airport from London Heathrow Airport is in February. Flight prices, which tend to average around £424, 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 O'Hare Intl Airport from London Heathrow Airport during September instead. Flights to Chicago O'Hare Intl Airport in September, while not as cheap as those in February, still average around £426.

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

The cheapest day to depart from London Heathrow Airport to Chicago O'Hare Intl Airport is on a Wednesday. Travellers who choose to depart for Chicago O'Hare Intl Airport on a Wednesday will often find tickets for as low as £603. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Chicago O'Hare Intl Airport on Saturday is £646.

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

The cheapest time of day to fly to Chicago O'Hare Intl Airport is at midday when flights can be purchased for as low as £620. In contrast, the most expensive time of day to depart to Chicago O'Hare Intl Airport is in the afternoon when prices are around £653.

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

Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around £528 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from London Heathrow Airport for as low as £505 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Chicago O'Hare Intl Airport flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Chicago O'Hare Intl Airport.

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

As of January 2026, prices for London Heathrow Airport to Chicago O'Hare Intl Airport flights are approximately 3% more expensive when compared to flights at the same time last year.

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

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

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

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

Best price found

£441

Fastest flight time

8h 40m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from London Heathrow Airport in the past 72 hours is £441. The best return flight deal from London Heathrow Airport to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is £481.
The fastest flight from London Heathrow Airport to Chicago O'Hare Intl Airport takes 8h 40m
Direct flights go from London Heathrow Airport to Chicago O'Hare Intl Airport every day.
Search flight deals

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

    The distance between London Heathrow and Chicago O'Hare Intl is about 3939.2 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 Heathrow Airport to Chicago O'Hare Intl Airport?

    Prices for flights from London Heathrow Airport to Chicago O'Hare Intl Airport were last updated today.

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

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

    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 Heathrow Airport 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 Heathrow Airport to Chicago O'Hare Intl Airport?

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

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

Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £327Free CancellationRating
7.1
603 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £337Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
Scandinavian AirlinesPriceFrom £351Free CancellationRating
7.3
1,672 reviews
Search Scandinavian Airlines flights
Aer LingusPriceFrom £358Free CancellationRating
7.2
1,442 reviews
Search Aer Lingus flights
TAP AIR PORTUGALPriceFrom £377Free CancellationRating
7.1
2,130 reviews
Search TAP AIR PORTUGAL flights
Brussels AirlinesPriceFrom £377Free CancellationRating
7.2
381 reviews
Search Brussels Airlines flights
LufthansaPriceFrom £386Free CancellationRating
6.8
7,749 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom £391Free CancellationRating
7.5
895 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom £393Free CancellationRating
6.7
7,704 reviews
Search British Airways flights
United AirlinesPriceFrom £399Free CancellationRating
7.4
9,213 reviews
Search United Airlines flights

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

    Finnair flight deals from London Heathrow Airport to Chicago O'Hare Intl Airport start from £418 round-trip. Over the 28 Finnair flights for this route in a normal week, average airfare is usually £550 round-trip - but some users have found much cheaper deals with momondo.

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

    Another popular option for London Heathrow Airport to Chicago O'Hare Intl Airport flights is Austrian Airlines (7.5/10, 895 ratings). Austrian Airlines flies from London Heathrow Airport to Chicago O'Hare Intl Airport around 13 times per week, with deals starting from £391 round-trip and rising to an average price of around £593.

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Racine
Evanston
Northbrook
Lincolnshire
Lake Geneva
Joliet
Oak Park
Oak Brook
Schaumburg
Elgin
Rosemont

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Chicago. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Chicago from London with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Chicago from London.

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

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from London and alert you when they change.

An easier way to manage your Chicago O'Hare Intl Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 27/2
Fri 6/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Chicago