Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Chicago to London from $235

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 to London departing on 11/5. 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 to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
$526Icelandair
Find Deal
lun., dic. 29 - vie., ene. 9
Icelandair Logo
6:30 pm - 7:30 pmORD-LHR
19h 00m1 stop
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
$528Icelandair
Find Deal
mié., dic. 31 - jue., ene. 15
Scandinavian Airlines Logo
7:20 pm - 8:55 amORD-LHR
31h 35m2 stops
Scandinavian Airlines Logo
6:40 am - 4:45 pmLHR-ORD
16h 05m1 stop
$529Scandinavian Airlines
Find Deal
dom., nov. 16 - mié., nov. 19
Scandinavian Airlines Logo
10:40 am - 4:00 pmORD-LHR
23h 20m2 stops
Scandinavian Airlines Logo
6:40 am - 4:45 pmLHR-ORD
16h 05m1 stop
$530Scandinavian Airlines
Find Deal
jue., ene. 29 - vie., feb. 6
Scandinavian Airlines Logo
10:40 am - 9:20 amORD-LHR
16h 40m2 stops
Scandinavian Airlines Logo
10:20 am - 4:45 pmLHR-ORD
12h 25m1 stop
$531Scandinavian Airlines
Find Deal
jue., feb. 26 - mié., mar. 4
Scandinavian Airlines Logo
10:40 am - 9:20 amORD-LHR
16h 40m2 stops
Scandinavian Airlines Logo
10:20 am - 4:45 pmLHR-ORD
12h 25m1 stop
$533Scandinavian Airlines
Find Deal
jue., feb. 26 - lun., mar. 2
Aer Lingus Logo
4:50 pm - 9:05 amORD-LHR
11h 15m1 stop
Aer Lingus Logo
7:50 am - 2:00 pmLHR-ORD
12h 10m1 stop
$551Aer Lingus
Find Deal
dom., oct. 26 - mar., nov. 4
Aer Lingus Logo
9:00 pm - 3:35 pmORD-LHR
12h 35m1 stop
Aer Lingus Logo
7:50 am - 7:15 pmLHR-ORD
17h 25m1 stop
$553Aer Lingus
Find Deal
mié., ene. 28 - jue., feb. 12
TAP AIR PORTUGAL Logo
8:25 pm - 5:30 pmORD-LHR
15h 05m1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 2:45 pmLHR-ORD
26h 15m1 stop
$555TAP AIR PORTUGAL
Find Deal
dom., nov. 9 - sáb., nov. 15
Iberia Logo
9:45 pm - 10:25 amORD-LHR
7h 40mnonstop
Iberia Logo
7:40 pm - 2:30 pmLHR-ORD
24h 50m1 stop
$577Iberia
Find Deal
dom., oct. 26 - mar., nov. 4

Aer Lingus flights from Chicago to London Heathrow Airport

Our best Aer Lingus deals on Chicago to London Heathrow Airport flight tickets
Aer Lingus
Oct 26
ORD4:50 pmChicago O'Hare Intl
11h 15m
1 stop
LHR9:05 amLondon Heathrow
Nov 4
LHR7:50 amLondon Heathrow
12h 10m
1 stop
ORD2:00 pmChicago O'Hare Intl
$551
Find similar
Aer Lingus
Jan 28
ORD9:00 pmChicago O'Hare Intl
12h 35m
1 stop
LHR3:35 pmLondon Heathrow
Feb 12
LHR7:50 amLondon Heathrow
17h 25m
1 stop
ORD7:15 pmChicago O'Hare Intl
$553
Find similar
Aer Lingus
Oct 19
ORD9:15 pmChicago O'Hare Intl
11h 40m
1 stop
LHR2:55 pmLondon Heathrow
Nov 5
LHR8:50 amLondon Heathrow
11h 10m
1 stop
ORD2:00 pmChicago O'Hare Intl
$554
Find similar

TAP AIR PORTUGAL flights from Chicago to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on Chicago to London Heathrow Airport flight tickets
TAP AIR PORTUGAL
Nov 9
ORD8:25 pmChicago O'Hare Intl
15h 05m
1 stop
LHR5:30 pmLondon Heathrow
Nov 15
LHR6:30 pmLondon Heathrow
26h 15m
1 stop
ORD2:45 pmChicago O'Hare Intl
$555
Find similar
TAP AIR PORTUGAL
Oct 23
ORD6:00 pmChicago O'Hare Intl
22h 05m
1 stop
LHR10:05 pmLondon Heathrow
Nov 12
LHR6:00 amLondon Heathrow
15h 00m
1 stop
ORD3:00 pmChicago O'Hare Intl
$574
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 octubre 16, 2025.
Use the filters below to find and compare flights from Chicago 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

lun. 12/29

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

vie. 1/9

12:15 pm-5:20 pm

1 stop11h 05m

$526

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 12/31

6:30 pm-7:30 pm

1 stop19h 00m

London Heathrow

jue. 1/15

12:15 pm-5:20 pm

1 stop11h 05m

$528

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 11/16

7:20 pm-8:55 am

2 stops31h 35m

London Heathrow

mié. 11/19

6:40 am-4:45 pm

1 stop16h 05m

$529

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 1/29

10:40 am-4:00 pm

2 stops23h 20m

London Heathrow

vie. 2/6

6:40 am-4:45 pm

1 stop16h 05m

$530

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 2/26

10:40 am-9:20 am

2 stops16h 40m

London Heathrow

mié. 3/4

10:20 am-4:45 pm

1 stop12h 25m

$531

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 2/26

10:40 am-9:20 am

2 stops16h 40m

London Heathrow

lun. 3/2

10:20 am-4:45 pm

1 stop12h 25m

$533

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 10/26

4:50 pm-9:05 am

1 stop11h 15m

London Heathrow

mar. 11/4

7:50 am-2:00 pm

1 stop12h 10m

$551

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 1/28

9:00 pm-3:35 pm

1 stop12h 35m

London Heathrow

jue. 2/12

7:50 am-7:15 pm

1 stop17h 25m

$553

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 11/9

8:25 pm-5:30 pm

1 stop15h 05m

London Heathrow

sáb. 11/15

6:30 pm-2:45 pm

1 stop26h 15m

$555

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom. 10/26

9:45 pm-10:25 am

Nonstop7h 40m

London Heathrow

mar. 11/4

7:40 pm-2:30 pm

1 stop24h 50m

$577

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 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 typical price of a round-trip flight between Chicago and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from Chicago, with most prices found around $671. If you’re not able to fly to London Heathrow Airport in January, then February is your next best option. Flight prices from Chicago to London Heathrow Airport during February average around $671.

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 $767. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $914.

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 to London Heathrow Airport in the morning for as low as $659. 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 $831.

What is the cheapest Chicago to London Heathrow flight route?

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $796 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 for as low as $696 on momondo.

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

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

You could potentially save up to 1% on your flight if you consider stops on a Chicago to London Heathrow Airport flight.

How have Chicago to London Heathrow Airport flight prices changed over time?

As of October 2025, prices for Chicago to London Heathrow Airport flights are approximately 48% more expensive when compared to flights at the same time last year.

When to book flights from Chicago to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago 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 to London Heathrow Airport (CHI to LHR) flight deals and tips

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

Best Price Found

$446

Fastest flight time

7h 40m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Chicago in the past 72 hours is $446. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $661.
The fastest flight from Chicago to London Heathrow Airport takes 7h 40m
Direct flights go from Chicago to London Heathrow Airport every day.
Search flight deals

  • How far is Chicago to London Heathrow by plane?

    There are 3933.5 mi between Chicago and London Heathrow. A reasonable flight in good conditions will take 7h 40m.

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

    Prices for flights from Chicago to London Heathrow Airport refresh daily.

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

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

    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 Chicago 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 to London Heathrow Airport?

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

Best airlines flying from Chicago to London Heathrow Airport

Compare and see reviews for airlines that fly from Chicago to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $51Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.5
1,772 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,533 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
7,981 reviews
Search Delta flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,497 reviews
Search Lufthansa flights
TAP AIR PORTUGALPriceFrom $450Free CancellationRating
7.1
2,016 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $479Free CancellationRating
7.0
556 reviews
Search Icelandair flights
Aer LingusPriceFrom $503Free CancellationRating
7.2
1,341 reviews
Search Aer Lingus flights
FinnairPriceFrom $544Free CancellationRating
7.6
1,332 reviews
Search Finnair flights
British AirwaysPriceFrom $562Free CancellationRating
6.7
7,457 reviews
Search British Airways flights

  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair operates around 28 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $776, but momondo users have found Finnair deals from Chicago to London Heathrow Airport from as low as $544 round-trip. Finnair has been scored 7.6/10 in 1,332 reviews.

  • SWISS Flights From Chicago to London Heathrow Airport

    SWISS (7.5/10 from 1,772 reviews) operates around 21 flights from Chicago to London Heathrow Airport in any given week. The average SWISS airfare for this route is around $626, with deals from around $257 rare but found on momondo. Referenced prices are for round-trip Chicago to London Heathrow Airport flight searches in the last 72 hours.

Traveling to a place near London?

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

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Chicago.

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

Flights from Chicago to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to London.

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

If you are not ready to book a flight from Chicago to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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
sáb. 11/15
sáb. 11/22
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 $334
Flights to London City Airportfrom $451
Flights to London Stansted Airportfrom $391
Flights to London Luton Airportfrom $395
Flights to Glasgow Intl Airportfrom $400
Flights to Belfast Intl Airportfrom $523
Flights to London Southend Airportfrom $551
Flights to Belfast City Airportfrom $536