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Cheap flights from London Heathrow Airport to Chicago from $347

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 9/30. 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

Logo
9:30 am - 7:55 pmLHR-ORD
16h 25m1 stop
Logo
7:05 pm - 7:20 pmORD-LHR
18h 15m1 stop
$450
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Tue, Sep 23 - Tue, Sep 30
United Airlines Logo
11:05 am - 12:05 pmLHR-ORD
31h 00m1 stop
United Airlines Logo
10:35 am - 9:00 pmORD-LHR
28h 25m1 stop
$461United Airlines
Find Deal
Thu, Sep 25 - Sat, Sep 27
SWISS Logo
9:00 am - 4:20 pmLHR-ORD
13h 20m1 stop
SWISS Logo
6:50 pm - 4:20 pmORD-LHR
15h 30m1 stop
$478SWISS
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Fri, Nov 21 - Tue, Dec 2
Lufthansa Logo
9:30 am - 7:55 pmLHR-ORD
16h 25m1 stop
Lufthansa Logo
10:30 pm - 8:40 pmORD-LHR
16h 10m1 stop
$479Lufthansa
Find Deal
Wed, Sep 17 - Sun, Sep 28
Lufthansa Logo
11:10 am - 6:25 pmLHR-ORD
13h 15m1 stop
Lufthansa Logo
4:20 pm - 10:45 amORD-LHR
12h 25m1 stop
$483Lufthansa
Find Deal
Fri, Nov 28 - Wed, Dec 3
TAP AIR PORTUGAL Logo
6:30 pm - 3:15 pmLHR-ORD
26h 45m1 stop
TAP AIR PORTUGAL Logo
7:10 pm - 3:30 pmORD-LHR
14h 20m1 stop
$508TAP AIR PORTUGAL
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Thu, Nov 6 - Wed, Nov 12
TAP AIR PORTUGAL Logo
6:30 pm - 3:15 pmLHR-ORD
26h 45m1 stop
TAP AIR PORTUGAL Logo
7:10 pm - 3:30 pmORD-LHR
14h 20m1 stop
$510TAP AIR PORTUGAL
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Thu, Nov 6 - Wed, Nov 12
Icelandair Logo
9:25 pm - 9:15 pmLHR-ORD
29h 50m1 stop
Icelandair Logo
10:15 pm - 8:20 pmORD-LHR
16h 05m1 stop
$530Icelandair
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Tue, Sep 30 - Sun, Oct 5
Icelandair Logo
1:05 pm - 9:15 pmLHR-ORD
14h 10m1 stop
Icelandair Logo
7:25 pm - 11:55 amORD-LHR
10h 30m1 stop
$532Icelandair
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Thu, Sep 11 - Thu, Sep 18
British Airways Logo
9:50 am - 3:45 pmLHR-ORD
11h 55m1 stop
British Airways Logo
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
$548British Airways
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Wed, Sep 3 - Tue, Sep 9

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

Our best Icelandair deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
Icelandair
Sep 30
LHR9:25 pmLondon Heathrow
29h 50m
1 stop
ORD9:15 pmChicago O'Hare Intl
Oct 5
ORD10:15 pmChicago O'Hare Intl
16h 05m
1 stop
LHR8:20 pmLondon Heathrow
$530
Find similar
Icelandair
Sep 11
LHR1:05 pmLondon Heathrow
14h 10m
1 stop
ORD9:15 pmChicago O'Hare Intl
Sep 18
ORD7:25 pmChicago O'Hare Intl
10h 30m
1 stop
LHR11:55 amLondon Heathrow
$532
Find similar
Icelandair
Sep 12
LHR9:25 pmLondon Heathrow
26h 50m
1 stop
ORD6:15 pmChicago O'Hare Intl
Sep 19
ORD7:25 pmChicago O'Hare Intl
10h 30m
1 stop
LHR11:55 amLondon Heathrow
$535
Find similar

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
Nov 6
LHR6:30 pmLondon Heathrow
26h 45m
1 stop
ORD3:15 pmChicago O'Hare Intl
Nov 12
ORD7:10 pmChicago O'Hare Intl
14h 20m
1 stop
LHR3:30 pmLondon Heathrow
$508
Find similar
TAP AIR PORTUGAL
Nov 6
LHR6:30 pmLondon Heathrow
26h 45m
1 stop
ORD3:15 pmChicago O'Hare Intl
Nov 12
ORD7:10 pmChicago O'Hare Intl
14h 20m
1 stop
LHR3:30 pmLondon Heathrow
$510
Find similar
TAP AIR PORTUGAL
Sep 17
LHR1:45 pmLondon Heathrow
27h 10m
1 stop
ORD10:55 amChicago O'Hare Intl
Sep 28
ORD6:00 pmChicago O'Hare Intl
22h 00m
1 stop
LHR10:00 pmLondon Heathrow
$519
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 July 30, 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

Tue 9/23

9:30 am-7:55 pm

1 stop16h 25m

Chicago O'Hare Intl

Tue 9/30

7:05 pm-7:20 pm

1 stop18h 15m

$450

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/25

11:05 am-12:05 pm

1 stop31h 00m

Chicago O'Hare Intl

Sat 9/27

10:35 am-9:00 pm

1 stop28h 25m

$461

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 11/21

9:00 am-4:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Tue 12/2

6:50 pm-4:20 pm

1 stop15h 30m

$478

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/17

9:30 am-7:55 pm

1 stop16h 25m

Chicago O'Hare Intl

Sun 9/28

10:30 pm-8:40 pm

1 stop16h 10m

$479

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 11/28

11:10 am-6:25 pm

1 stop13h 15m

Chicago O'Hare Intl

Wed 12/3

4:20 pm-10:45 am

1 stop12h 25m

$483

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/6

6:30 pm-3:15 pm

1 stop26h 45m

Chicago O'Hare Intl

Wed 11/12

7:10 pm-3:30 pm

1 stop14h 20m

$508

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/6

6:30 pm-3:15 pm

1 stop26h 45m

Chicago O'Hare Intl

Wed 11/12

7:10 pm-3:30 pm

1 stop14h 20m

$510

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/30

9:25 pm-9:15 pm

1 stop29h 50m

Chicago O'Hare Intl

Sun 10/5

10:15 pm-8:20 pm

1 stop16h 05m

$530

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/11

1:05 pm-9:15 pm

1 stop14h 10m

Chicago O'Hare Intl

Thu 9/18

7:25 pm-11:55 am

1 stop10h 30m

$532

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/3

9:50 am-3:45 pm

1 stop11h 55m

Chicago O'Hare Intl

Tue 9/9

4:55 pm-6:50 am

Nonstop7h 55m

$548

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 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 $666.

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 $789. 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 $938.

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 $954. 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 $738 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 $694 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 July 2025, prices for London Heathrow Airport to Chicago O'Hare Intl Airport flights are approximately 21% 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

$347

Fastest flight time

11h 10m

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 $347. 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 $450.
The fastest flight from London Heathrow Airport to Chicago O'Hare Intl Airport takes 11h 10m
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. 11h 10m 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
519 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $462Free CancellationRating
7.3
1,453 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
8,896 reviews
Search United Airlines flights
British AirwaysPriceFrom $552Free CancellationRating
6.6
7,217 reviews
Search British Airways flights
TAP AIR PORTUGALPriceFrom $558Free CancellationRating
7.1
1,930 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $568Free CancellationRating
7.1
1,191 reviews
Search Aer Lingus flights
IberiaPriceFrom $582Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
American AirlinesPriceFrom $583Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Austrian AirlinesPriceFrom $586Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
FinnairPriceFrom $607Free CancellationRating
7.6
1,316 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 823 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, 1,316 ratings). Finnair flies from London Heathrow Airport to Chicago O'Hare Intl Airport around 33 times per week, with deals starting from $607 round-trip and rising to an average price of around $838.

Traveling to a place near Chicago?

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