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Cheap flights from London Heathrow Airport to Chicago from $537

This is the cheapest round-trip 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 9/21. 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

Aer Lingus Logo
8:50 am - 2:00 pmLHR-ORD
11h 10m1 stop
Aer Lingus Logo
3:45 pm - 9:05 amORD-LHR
11h 20m1 stop
$537Aer Lingus
Find Deal
dom., sep. 21 - sáb., sep. 27
United Airlines Logo
7:45 am - 4:35 pmLHR-ORD
14h 50m2 stops
United Airlines Logo
10:40 am - 6:30 amORD-LHR
13h 50m1 stop
$538United Airlines
Find Deal
mar., sep. 30 - mar., oct. 14
Icelandair Logo
8:35 pm - 5:20 pmLHR-ORD
26h 45m1 stop
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
$542Icelandair
Find Deal
mar., dic. 2 - mié., ene. 14
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
$544Icelandair
Find Deal
dom., nov. 2 - dom., nov. 16
Finnair Logo
9:45 am - 5:23 pmLHR-ORD
13h 38m1 stop
Finnair Logo
8:38 am - 9:05 amORD-LHR
18h 27m1 stop
$550Finnair
Find Deal
lun., sep. 29 - dom., oct. 5
Finnair Logo
3:00 pm - 11:53 pmLHR-ORD
14h 53m1 stop
Finnair Logo
10:20 pm - 6:20 amORD-LHR
26h 00m2 stops
$563Finnair
Find Deal
jue., oct. 9 - lun., oct. 13
American Airlines Logo
9:15 am - 11:50 amLHR-ORD
8h 35mnonstop
American Airlines Logo
1:59 pm - 6:20 amORD-LHR
10h 21m1 stop
$564American Airlines
Find Deal
lun., sep. 22 - mié., oct. 1
American Airlines Logo
8:50 am - 3:45 pmLHR-ORD
12h 55m1 stop
American Airlines Logo
1:59 pm - 7:45 amORD-LHR
11h 46m1 stop
$565American Airlines
Find Deal
lun., sep. 22 - mié., oct. 1
British Airways Logo
9:15 am - 4:05 pmLHR-ORD
12h 50m1 stop
British Airways Logo
4:52 pm - 10:20 amORD-LHR
11h 28m1 stop
$581British Airways
Find Deal
jue., oct. 9 - lun., oct. 13
British Airways Logo
12:35 pm - 3:25 pmLHR-ORD
8h 50mnonstop
British Airways Logo
10:45 pm - 11:35 amORD-LHR
7h 50mnonstop
$585British Airways
Find Deal
mar., mar. 3 - jue., mar. 19

Lufthansa flights from London Heathrow Airport to Chicago O'Hare Intl Airport

Our best Lufthansa deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
Lufthansa
Oct 8
LHR8:30 amLondon Heathrow
12h 25m
1 stop
ORD2:55 pmChicago O'Hare Intl
Oct 15
ORD10:30 pmChicago O'Hare Intl
13h 10m
1 stop
LHR5:40 pmLondon Heathrow
$543
Find similar
Lufthansa
Sep 16
LHR2:10 pmLondon Heathrow
8h 35m
ORD4:45 pmChicago O'Hare Intl
Sep 29
ORD4:00 pmChicago O'Hare Intl
8h 20m
LHR6:20 amLondon Heathrow
$552
Find similar
Lufthansa
Oct 9
LHR2:50 pmLondon Heathrow
35h 35m
1 stop
ORD8:25 pmChicago O'Hare Intl
Oct 16
ORD6:00 pmChicago O'Hare Intl
8h 20m
LHR8:20 amLondon Heathrow
$559
Find similar

Finnair flights from London Heathrow Airport to Chicago O'Hare Intl Airport

Our best Finnair deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
Finnair
Sep 16
LHR5:00 pmLondon Heathrow
22h 04m
2 stops
ORD9:04 amChicago O'Hare Intl
Sep 30
ORD1:59 pmChicago O'Hare Intl
10h 21m
1 stop
LHR6:20 amLondon Heathrow
$549
Find similar
Finnair
Sep 29
LHR9:45 amLondon Heathrow
13h 38m
1 stop
ORD5:23 pmChicago O'Hare Intl
Oct 5
ORD8:38 amChicago O'Hare Intl
18h 27m
1 stop
LHR9:05 amLondon Heathrow
$550
Find similar
Finnair
Oct 9
LHR3:00 pmLondon Heathrow
14h 53m
1 stop
ORD11:53 pmChicago O'Hare Intl
Oct 13
ORD10:20 pmChicago O'Hare Intl
26h 00m
2 stops
LHR6:20 amLondon Heathrow
$563
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated septiembre 11, 2025.
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

dom. 9/21

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

sáb. 9/27

3:45 pm-9:05 am

1 stop11h 20m

$537

LondonChicago

LHR - ORD

LHRORD

London Heathrow

mar. 9/30

7:45 am-4:35 pm

2 stops14h 50m

Chicago O'Hare Intl

mar. 10/14

10:40 am-6:30 am

1 stop13h 50m

$538

LondonChicago

LHR - ORD

LHRORD

London Heathrow

mar. 12/2

8:35 pm-5:20 pm

1 stop26h 45m

Chicago O'Hare Intl

mié. 1/14

6:30 pm-10:50 am

1 stop10h 20m

$542

LondonChicago

LHR - ORD

LHRORD

London Heathrow

dom. 11/2

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

dom. 11/16

6:30 pm-10:50 am

1 stop10h 20m

$544

LondonChicago

LHR - ORD

LHRORD

London Heathrow

lun. 9/29

9:45 am-5:23 pm

1 stop13h 38m

Chicago O'Hare Intl

dom. 10/5

8:38 am-9:05 am

1 stop18h 27m

$550

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 10/9

3:00 pm-11:53 pm

1 stop14h 53m

Chicago O'Hare Intl

lun. 10/13

10:20 pm-6:20 am

2 stops26h 00m

$563

LondonChicago

LHR - ORD

LHRORD

London Heathrow

lun. 9/22

9:15 am-11:50 am

Nonstop8h 35m

Chicago O'Hare Intl

mié. 10/1

1:59 pm-6:20 am

1 stop10h 21m

$564

LondonChicago

LHR - ORD

LHRORD

London Heathrow

lun. 9/22

8:50 am-3:45 pm

1 stop12h 55m

Chicago O'Hare Intl

mié. 10/1

1:59 pm-7:45 am

1 stop11h 46m

$565

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 10/9

9:15 am-4:05 pm

1 stop12h 50m

Chicago O'Hare Intl

lun. 10/13

4:52 pm-10:20 am

1 stop11h 28m

$581

LondonChicago

LHR - ORD

LHRORD

London Heathrow

mar. 3/3

12:35 pm-3:25 pm

Nonstop8h 50m

Chicago O'Hare Intl

jue. 3/19

10:45 pm-11:35 am

Nonstop7h 50m

$585

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 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 month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from London Heathrow Airport averaging around $648.

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 $772. 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 Heathrow Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $924.

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 Heathrow Airport 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 $938. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $730 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 Heathrow Airport for as low as $699 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 September 2025, prices for London Heathrow Airport to Chicago O'Hare Intl Airport flights are approximately 0% 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 round-trip 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

$651

Fastest flight time

8h 25m

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 $651. The best round-trip flight deal from London Heathrow Airport to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $756.
The fastest flight from London Heathrow Airport to Chicago O'Hare Intl Airport takes 8h 25m
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 straight-line distance from London Heathrow to Chicago O'Hare Intl is 3939.2 mi. 8h 35m is a normal flight duration for this route.

  • 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 are updated daily.

  • 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 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 Heathrow Airport to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The required travel and health documents for your Chicago O'Hare Intl Airport 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 O'Hare Intl Airport. 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 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 $451Free CancellationRating
7.0
546 reviews
Search Icelandair flights
Aer LingusPriceFrom $453Free CancellationRating
7.2
1,271 reviews
Search Aer Lingus flights
Scandinavian AirlinesPriceFrom $462Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
British AirwaysPriceFrom $553Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
TAP AIR PORTUGALPriceFrom $558Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $582Free CancellationRating
7.0
2,929 reviews
Search Iberia flights
American AirlinesPriceFrom $582Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Austrian AirlinesPriceFrom $586Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
FinnairPriceFrom $607Free CancellationRating
7.6
1,323 reviews
Search Finnair flights

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

    Austrian Airlines flies from London Heathrow Airport to Chicago O'Hare Intl Airport around 21 times per week, with 850 momondo users rating the airline 7.6/10. The cheapest Austrian Airlines deal from London Heathrow Airport to Chicago O'Hare Intl Airport in the last 72 hours was $586 (round-trip), much lower than the average airfare cost of $967 for Austrian Airlines flights on this route.

  • Finnair 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 Finnair (7.6/10, 1,323 ratings). Finnair flies from London Heathrow Airport to Chicago O'Hare Intl Airport around 34 times per week, with deals starting from $607 round-trip and rising to an average price of around $809.

Traveling to a place near Chicago?

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

Why use momondo?

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

Finding the right flight to Chicago from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.

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?

Once you have performed a search for London to Chicago flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Chicago from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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