Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Chicago O'Hare Intl Airport to London from $230

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to London departing on 10/25. 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.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize 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 Chicago O'Hare Intl Airport to London

Cheap round-trip flights

Multiple Airlines Logo
3:35 pm - 9:35 amORD-LHR
12h 00m1 stop
Multiple Airlines Logo
9:00 am - 6:39 pmLHR-ORD
15h 39m2 stops
$505Multiple Airlines
Find Deal
Sun, Oct 19 - Tue, Nov 4
Multiple Airlines Logo
10:00 am - 6:30 amORD-LHR
14h 30m1 stop
Multiple Airlines Logo
12:05 pm - 4:20 pmLHR-ORD
34h 15m1 stop
$506Multiple Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
United Airlines Logo
6:00 pm - 8:20 amORD-LHR
8h 20mnonstop
United Airlines Logo
6:50 am - 12:05 pmLHR-ORD
11h 15m1 stop
$507United Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
Air Canada Logo
6:00 pm - 8:20 amORD-LHR
8h 20mnonstop
Air Canada Logo
8:30 am - 11:30 amLHR-ORD
9h 00mnonstop
$508Air Canada
Find Deal
Sun, Sep 21 - Tue, Sep 30
Air Canada Logo
7:10 am - 11:50 amORD-LHR
22h 40m1 stop
Air Canada Logo
2:10 pm - 5:20 pmLHR-ORD
9h 10mnonstop
$509Air Canada
Find Deal
Sun, Sep 21 - Tue, Sep 30
United Airlines Logo
9:08 pm - 7:30 amORD-LHR
29h 22m1 stop
United Airlines Logo
1:25 pm - 2:55 pmLHR-ORD
31h 30m1 stop
$510United Airlines
Find Deal
Sat, Nov 1 - Tue, Nov 25
British Airways Logo
6:10 pm - 6:55 amORD-LHR
7h 45mnonstop
British Airways Logo
11:00 am - 1:50 pmLHR-ORD
8h 50mnonstop
$512British Airways
Find Deal
Mon, Oct 27 - Thu, Nov 6
Icelandair Logo
7:25 pm - 11:55 amORD-LHR
10h 30m1 stop
Icelandair Logo
1:05 pm - 9:15 pmLHR-ORD
14h 10m1 stop
$523Icelandair
Find Deal
Fri, Oct 3 - Wed, Oct 15
Iberia Logo
5:40 pm - 7:20 amORD-LHR
7h 40mnonstop
Iberia Logo
9:45 am - 5:23 pmLHR-ORD
13h 38m1 stop
$529Iberia
Find Deal
Mon, Sep 22 - Tue, Sep 30
Icelandair Logo
6:30 pm - 7:30 pmORD-LHR
19h 00m1 stop
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
$537Icelandair
Find Deal
Thu, Nov 20 - Thu, Nov 27

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

Our best SWISS deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
SWISS
Sep 22
ORD7:05 pmChicago O'Hare Intl
11h 55m
1 stop
LHR1:00 pmLondon Heathrow
Oct 21
LHR8:45 amLondon Heathrow
13h 10m
1 stop
ORD3:55 pmChicago O'Hare Intl
$511
Find similar
SWISS
Oct 6
ORD4:00 pmChicago O'Hare Intl
8h 20m
LHR6:20 amLondon Heathrow
Oct 13
LHR8:05 pmLondon Heathrow
25h 50m
1 stop
ORD3:55 pmChicago O'Hare Intl
$521
Find similar

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

Our best Iberia deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
Iberia
Sep 22
ORD5:40 pmChicago O'Hare Intl
7h 40m
LHR7:20 amLondon Heathrow
Sep 30
LHR9:45 amLondon Heathrow
13h 38m
1 stop
ORD5:23 pmChicago O'Hare Intl
$529
Find similar
Iberia
Sep 22
ORD3:09 pmChicago O'Hare Intl
10h 41m
1 stop
LHR7:50 amLondon Heathrow
Sep 30
LHR9:45 amLondon Heathrow
13h 38m
1 stop
ORD5:23 pmChicago O'Hare Intl
$533
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to London Heathrow 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 September 16, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/19

3:35 pm-9:35 am

1 stop12h 00m

London Heathrow

Tue 11/4

9:00 am-6:39 pm

2 stops15h 39m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 11/4

10:00 am-6:30 am

1 stop14h 30m

London Heathrow

Mon 11/10

12:05 pm-4:20 pm

1 stop34h 15m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 9/30

6:00 pm-8:20 am

Nonstop8h 20m

London Heathrow

Tue 10/7

6:50 am-12:05 pm

1 stop11h 15m

$507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/21

6:00 pm-8:20 am

Nonstop8h 20m

London Heathrow

Tue 9/30

8:30 am-11:30 am

Nonstop9h 00m

$508

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/21

7:10 am-11:50 am

1 stop22h 40m

London Heathrow

Tue 9/30

2:10 pm-5:20 pm

Nonstop9h 10m

$509

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 11/1

9:08 pm-7:30 am

1 stop29h 22m

London Heathrow

Tue 11/25

1:25 pm-2:55 pm

1 stop31h 30m

$510

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 10/27

6:10 pm-6:55 am

Nonstop7h 45m

London Heathrow

Thu 11/6

11:00 am-1:50 pm

Nonstop8h 50m

$512

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 10/3

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Wed 10/15

1:05 pm-9:15 pm

1 stop14h 10m

$523

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 9/22

5:40 pm-7:20 am

Nonstop7h 40m

London Heathrow

Tue 9/30

9:45 am-5:23 pm

1 stop13h 38m

$529

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 11/20

6:30 pm-7:30 pm

1 stop19h 00m

London Heathrow

Thu 11/27

12:15 pm-5:20 pm

1 stop11h 05m

$537

Flights are sorted by cheapest round-trip flights first.

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

See travel insights to London from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to London Heathrow 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 London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Chicago O'Hare Intl Airport, with most prices found around $672. If you’re not able to fly to London Heathrow Airport in February, then April is your next best option. Flight prices from Chicago O'Hare Intl Airport to London Heathrow Airport during April average around $677.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $762. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $908.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Chicago O'Hare Intl Airport to London Heathrow Airport in the morning for as low as $663. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $827.

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

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago O'Hare Intl - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $793 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Chicago O'Hare Intl Airport for as low as $694 on momondo.

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

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

You could potentially save up to 11% on your flight if you consider stops on a Chicago O'Hare Intl Airport to London Heathrow Airport flight.

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

As of September 2025, prices for Chicago O'Hare Intl Airport to London Heathrow Airport flights are approximately 15% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$438

Fastest flight time

7h 40m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Chicago O'Hare Intl Airport in the past 72 hours is $438. The best round-trip flight deal from Chicago O'Hare Intl Airport to London Heathrow Airport found on momondo in the last 72 hours is $642.
The fastest flight from Chicago O'Hare Intl Airport to London Heathrow Airport takes 7h 40m
Direct flights go from Chicago O'Hare Intl Airport to London Heathrow Airport every day.
Search flight deals

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

    London Heathrow is 3939.2 mi away from Chicago O'Hare Intl. By plane, this route typically takes 7h 40m.

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

    Prices for flights from Chicago O'Hare Intl Airport to London Heathrow Airport refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago O'Hare Intl Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow 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 London Heathrow 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 Chicago O'Hare Intl Airport to London Heathrow Airport?

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

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

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $51Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.6
1,737 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
7,957 reviews
Search Delta flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
TAP AIR PORTUGALPriceFrom $450Free CancellationRating
7.1
1,975 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $472Free CancellationRating
7.0
544 reviews
Search Icelandair flights
Aer LingusPriceFrom $537Free CancellationRating
7.2
1,274 reviews
Search Aer Lingus flights
FinnairPriceFrom $547Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
British AirwaysPriceFrom $564Free CancellationRating
6.7
7,363 reviews
Search British Airways flights

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

    SWISS operates around 21 flights from Chicago O'Hare Intl Airport to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $626, but momondo users have found SWISS deals from Chicago O'Hare Intl Airport to London Heathrow Airport from as low as $257 round-trip. SWISS has been scored 7.6/10 in 1,737 reviews.

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

    Another popular option for Chicago O'Hare Intl Airport to London Heathrow Airport flights is Finnair (7.6/10, 1,324 ratings). Finnair flies from Chicago O'Hare Intl Airport to London Heathrow Airport around 27 times per week, with deals starting from $547 round-trip and rising to an average price of around $765.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Salisbury
Brentwood
Ilford
Folkestone
Colchester
Swindon
Stratford-upon-Avon
Watford

Why use momondo?

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

It is quick and easy to find Chicago to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

All flight searches from Chicago to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Chicago and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to London from Chicago 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.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize 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
Thu 10/16
Thu 10/23
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Gatwick Airportfrom $340
Flights to London City Airportfrom $452
Flights to London Stansted Airportfrom $406
Flights to London Luton Airportfrom $405
Flights to Glasgow Intl Airportfrom $390
Flights to Belfast Intl Airportfrom $477
Flights to London Southend Airportfrom $415
Flights to Belfast City Airportfrom $497