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Cheap flights from London Heathrow Airport to Chicago from $520

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 12/2. 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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Find the cheapest flights from London Heathrow Airport to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
10:20 am - 5:45 pmLHR-ORD
12h 25m1 stop
Scandinavian Airlines Logo
7:20 pm - 4:00 pmORD-LHR
14h 40m1 stop
$532Scandinavian Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
Scandinavian Airlines Logo
7:30 pm - 4:45 pmLHR-ORD
27h 15m1 stop
Scandinavian Airlines Logo
7:20 pm - 5:40 pmORD-LHR
16h 20m1 stop
$533Scandinavian Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
TAP AIR PORTUGAL Logo
6:30 pm - 3:00 pmLHR-ORD
26h 30m1 stop
TAP AIR PORTUGAL Logo
8:15 pm - 6:55 pmORD-LHR
16h 40m1 stop
$534TAP AIR PORTUGAL
Find Deal
Tue, Nov 18 - Fri, Nov 28
Scandinavian Airlines Logo
10:20 am - 4:45 pmLHR-ORD
12h 25m1 stop
Scandinavian Airlines Logo
7:20 pm - 4:25 pmORD-LHR
15h 05m2 stops
$535Scandinavian Airlines
Find Deal
Fri, Nov 7 - Fri, Nov 28
TAP AIR PORTUGAL Logo
6:30 pm - 3:25 pmLHR-ORD
26h 55m1 stop
TAP AIR PORTUGAL Logo
7:10 pm - 5:30 pmORD-LHR
16h 20m1 stop
$536TAP AIR PORTUGAL
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Thu, Nov 6 - Wed, Nov 12
Icelandair Logo
8:35 pm - 5:20 pmLHR-ORD
26h 45m1 stop
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
$578Icelandair
Find Deal
Sun, Jan 11 - Tue, Jan 20
Multiple Airlines Logo
8:05 pm - 12:45 pmLHR-ORD
22h 40m1 stop
Multiple Airlines Logo
9:05 pm - 11:15 amORD-LHR
8h 10mnonstop
$579Multiple Airlines
Find Deal
Mon, Nov 17 - Mon, Dec 1
Multiple Airlines Logo
12:15 pm - 11:55 pmLHR-MDW
17h 40m2 stops
Multiple Airlines Logo
6:20 am - 7:30 pmMDW-LHR
31h 10m2 stops
$622Multiple Airlines
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Thu, Nov 13 - Thu, Nov 20
Virgin Atlantic Logo
11:45 am - 11:40 pmLHR-MDW
17h 55m2 stops
Virgin Atlantic Logo
9:34 am - 7:50 amMDW-LHR
16h 16m2 stops
$663Virgin Atlantic
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Tue, Nov 25 - Wed, Dec 3
Virgin Atlantic Logo
10:45 am - 11:40 pmLHR-MDW
18h 55m1 stop
Virgin Atlantic Logo
9:59 am - 7:05 amMDW-LHR
15h 06m1 stop
$679Virgin Atlantic
Find Deal
Tue, Nov 25 - Wed, Dec 3

Icelandair flights from London Heathrow Airport to Chicago

Our best Icelandair deals on London Heathrow Airport to Chicago flight tickets
Icelandair
Jan 11
LHR8:35 pmLondon Heathrow
26h 45m
1 stop
ORD5:20 pmChicago O'Hare Intl
Jan 20
ORD6:30 pmChicago O'Hare Intl
10h 20m
1 stop
LHR10:50 amLondon Heathrow
$578
Find similar
Icelandair
Oct 29
LHR7:25 amLondon Heathrow
18h 27m
1 stop
ORD8:52 pmChicago O'Hare Intl
Nov 4
ORD7:00 amChicago O'Hare Intl
32h 40m
1 stop
LHR9:40 pmLondon Heathrow
$664
Find similar
Icelandair
Oct 28
LHR9:20 amLondon Heathrow
30h 15m
1 stop
ORD10:35 amChicago O'Hare Intl
Nov 4
ORD6:55 pmChicago O'Hare Intl
30h 00m
1 stop
LHR6:55 amLondon Heathrow
$671
Find similar

Scandinavian Airlines flights from London Heathrow Airport to Chicago

Our best Scandinavian Airlines deals on London Heathrow Airport to Chicago flight tickets
Scandinavian Airlines
Oct 31
LHR10:20 amLondon Heathrow
12h 25m
1 stop
ORD5:45 pmChicago O'Hare Intl
Nov 7
ORD7:20 pmChicago O'Hare Intl
14h 40m
1 stop
LHR4:00 pmLondon Heathrow
$532
Find similar
Scandinavian Airlines
Nov 12
LHR7:30 pmLondon Heathrow
27h 15m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 19
ORD7:20 pmChicago O'Hare Intl
16h 20m
1 stop
LHR5:40 pmLondon Heathrow
$533
Find similar
Scandinavian Airlines
Nov 7
LHR10:20 amLondon Heathrow
12h 25m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 28
ORD7:20 pmChicago O'Hare Intl
15h 05m
2 stops
LHR4:25 pmLondon Heathrow
$535
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport 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 832,500 searches. Data last updated October 16, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 10/31

10:20 am-5:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Fri 11/7

7:20 pm-4:00 pm

1 stop14h 40m

$532

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 11/12

7:30 pm-4:45 pm

1 stop27h 15m

Chicago O'Hare Intl

Wed 11/19

7:20 pm-5:40 pm

1 stop16h 20m

$533

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 11/18

6:30 pm-3:00 pm

1 stop26h 30m

Chicago O'Hare Intl

Fri 11/28

8:15 pm-6:55 pm

1 stop16h 40m

$534

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 11/7

10:20 am-4:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Fri 11/28

7:20 pm-4:25 pm

2 stops15h 05m

$535

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/6

6:30 pm-3:25 pm

1 stop26h 55m

Chicago O'Hare Intl

Wed 11/12

7:10 pm-5:30 pm

1 stop16h 20m

$536

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 1/11

8:35 pm-5:20 pm

1 stop26h 45m

Chicago O'Hare Intl

Tue 1/20

6:30 pm-10:50 am

1 stop10h 20m

$578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 11/17

8:05 pm-12:45 pm

1 stop22h 40m

Chicago O'Hare Intl

Mon 12/1

9:05 pm-11:15 am

Nonstop8h 10m

$579

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 11/13

12:15 pm-11:55 pm

2 stops17h 40m

Chicago Midway

Thu 11/20

6:20 am-7:30 pm

2 stops31h 10m

$622

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 11/25

11:45 am-11:40 pm

2 stops17h 55m

Chicago Midway

Wed 12/3

9:34 am-7:50 am

2 stops16h 16m

$663

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 11/25

10:45 am-11:40 pm

1 stop18h 55m

Chicago Midway

Wed 12/3

9:59 am-7:05 am

1 stop15h 06m

$679

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 Heathrow Airport 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 month of February is, on average, the cheapest month to fly to Chicago from London Heathrow Airport, with most prices found around $592. If you’re not able to fly to Chicago in February, then September is your next best option. Flight prices from London Heathrow Airport to Chicago during September average around $600.

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 $787. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Chicago for around $910.

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

Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from London Heathrow Airport to Chicago during this time can be as low as $653. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $930.

What is the cheapest London Heathrow to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $729 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London Heathrow Airport for as low as $692 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Chicago flight prices changed over time?

As of October 2025, prices for London Heathrow Airport to Chicago flights are approximately 5% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Chicago

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

Cheap London Heathrow Airport to Chicago (LHR to CHI) flight deals and tips

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

Best Price Found

$586

Fastest flight time

8h 25m

Direct flights

Every day

Airports in Chicago

1 airport
The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is $586. The best round-trip flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is $581.
The fastest flight from London Heathrow Airport to Chicago takes 8h 25m
Direct flights go from London Heathrow Airport to Chicago every day.
There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)
Search flight deals

  • How far is London Heathrow to Chicago by plane?

    There are 3933.5 mi between London Heathrow and Chicago. 11h 34m is a normal flight duration for this route.

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

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

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

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

    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 Heathrow Airport to Chicago.

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

    The travel and health documents you'll need for your trip to Chicago 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. 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?

  • What is the most popular airline from London Heathrow Airport to Chicago?

Best airlines flying from London Heathrow Airport to Chicago

Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $451Free CancellationRating
7.0
556 reviews
Search Icelandair flights
Aer LingusPriceFrom $453Free CancellationRating
7.2
1,341 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights
Austrian AirlinesPriceFrom $530Free CancellationRating
7.6
855 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $554Free CancellationRating
6.7
7,457 reviews
Search British Airways flights
TAP AIR PORTUGALPriceFrom $558Free CancellationRating
7.1
2,016 reviews
Search TAP AIR PORTUGAL flights
American AirlinesPriceFrom $572Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
IberiaPriceFrom $599Free CancellationRating
7.0
2,994 reviews
Search Iberia flights
FinnairPriceFrom $626Free CancellationRating
7.6
1,332 reviews
Search Finnair flights
LufthansaPriceFrom $660Free CancellationRating
6.8
7,497 reviews
Search Lufthansa flights

  • Austrian Airlines Flights From London Heathrow Airport to Chicago

    Austrian Airlines flight deals from London Heathrow Airport to Chicago start from $530 round-trip. Over the 21 Austrian Airlines flights for this route in a normal week, average airfare is usually $943 round-trip - but some users have found much cheaper deals with momondo.

  • Finnair Flights From London Heathrow Airport to Chicago

    Another popular option for London Heathrow Airport to Chicago flights is Finnair (7.6/10, 1,332 ratings). Finnair flies from London Heathrow Airport to Chicago around 28 times per week, with deals starting from $626 round-trip and rising to an average price of around $852.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Portage
Lansing
Schererville
Valparaiso
Crown Point
Munster
Chesterton
Monticello
Porter
Griffith
Saint John

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?

All flight searches from London to Chicago on momondo can be filtered to show those which offer 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 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport