Cheap flights from Chicago to London from $165

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 10/1. 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.

Find the cheapest flights from Chicago to London

Cheap round-trip flights

Scandinavian Airlines Logo
7:20 pm - 4:25 pmORD-LHR
15h 05m2 stops
Scandinavian Airlines Logo
5:30 pm - 4:45 pmLHR-ORD
29h 15m2 stops
$415Scandinavian Airlines
Find Deal
Sat, Dec 6 - Thu, Dec 11
Scandinavian Airlines Logo
7:20 pm - 6:30 pmORD-LHR
17h 10m2 stops
Scandinavian Airlines Logo
7:05 am - 4:45 pmLHR-ORD
15h 40m2 stops
$417Scandinavian Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
Lufthansa Logo
5:55 pm - 11:25 amORD-LHR
11h 30m1 stop
Lufthansa Logo
6:50 am - 11:55 amLHR-ORD
11h 05m1 stop
$472Lufthansa
Find Deal
Tue, Aug 5 - Tue, Aug 26
Finnair Logo
9:30 pm - 10:10 pmORD-LHR
18h 40m1 stop
Finnair Logo
7:30 am - 5:50 pmLHR-ORD
16h 20m1 stop
$473Finnair
Find Deal
Wed, Aug 13 - Thu, Aug 28
Finnair Logo
9:30 pm - 10:10 pmORD-LHR
18h 40m1 stop
Finnair Logo
7:30 am - 5:50 pmLHR-ORD
16h 20m1 stop
$474Finnair
Find Deal
Tue, Aug 19 - Wed, Aug 27
Icelandair Logo
7:25 pm - 8:20 pmORD-LHR
18h 55m1 stop
Icelandair Logo
8:35 pm - 5:20 pmLHR-ORD
26h 45m1 stop
$481Icelandair
Find Deal
Sat, Oct 4 - Tue, Nov 4
Lufthansa Logo
1:06 pm - 5:55 amORD-LHR
10h 49m1 stop
Lufthansa Logo
8:30 am - 11:25 amLHR-ORD
8h 55mnonstop
$483Lufthansa
Find Deal
Wed, Aug 13 - Wed, Aug 27
British Airways Logo
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
British Airways Logo
6:20 am - 3:45 pmLHR-ORD
15h 25m1 stop
$488British Airways
Find Deal
Wed, Aug 6 - Tue, Aug 12
British Airways Logo
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
British Airways Logo
1:10 pm - 3:55 pmLHR-ORD
8h 45mnonstop
$490British Airways
Find Deal
Tue, Aug 5 - Tue, Aug 26
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
$501Icelandair
Find Deal
Sun, Nov 30 - Sat, Dec 6

Scandinavian Airlines flights from Chicago to London Heathrow Airport

Our best Scandinavian Airlines deals on Chicago to London Heathrow Airport flight tickets
Scandinavian Airlines
Dec 6
ORD7:20 pmChicago O'Hare Intl
15h 05m
2 stops
LHR4:25 pmLondon Heathrow
Dec 11
LHR5:30 pmLondon Heathrow
29h 15m
2 stops
ORD4:45 pmChicago O'Hare Intl
Scandinavian Airlines
Nov 7
ORD7:20 pmChicago O'Hare Intl
17h 10m
2 stops
LHR6:30 pmLondon Heathrow
Nov 13
LHR7:05 amLondon Heathrow
15h 40m
2 stops
ORD4:45 pmChicago O'Hare Intl
Scandinavian Airlines
Dec 6
ORD7:20 pmChicago O'Hare Intl
15h 05m
2 stops
LHR4:25 pmLondon Heathrow
Dec 11
LHR10:20 amLondon Heathrow
12h 25m
1 stop
ORD4:45 pmChicago O'Hare Intl

Finnair flights from Chicago to London Heathrow Airport

Our best Finnair deals on Chicago to London Heathrow Airport flight tickets
Finnair
Aug 13
ORD9:30 pmChicago O'Hare Intl
18h 40m
1 stop
LHR10:10 pmLondon Heathrow
Aug 28
LHR7:30 amLondon Heathrow
16h 20m
1 stop
ORD5:50 pmChicago O'Hare Intl
Finnair
Aug 19
ORD9:30 pmChicago O'Hare Intl
18h 40m
1 stop
LHR10:10 pmLondon Heathrow
Aug 27
LHR7:30 amLondon Heathrow
16h 20m
1 stop
ORD5:50 pmChicago O'Hare Intl
Finnair
Aug 13
ORD9:30 pmChicago O'Hare Intl
17h 10m
1 stop
LHR8:40 pmLondon Heathrow
Aug 27
LHR7:30 amLondon Heathrow
16h 20m
1 stop
ORD5:50 pmChicago O'Hare Intl

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 November is, on average, the cheapest month to fly to London Heathrow Airport from Chicago, with most prices found around $661. If you’re not able to fly to London Heathrow Airport in November, then April is your next best option. Flight prices from Chicago to London Heathrow Airport during April average around $670.

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

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $763. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $889.

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 $689. 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 $824.

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 $802 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 $715 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 24% 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 July 2025, prices for Chicago to London Heathrow Airport flights are approximately 39% cheaper 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

$165

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 $165. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $415.
The fastest flight from Chicago to London Heathrow Airport takes 7h 40m
Direct flights go from Chicago to London Heathrow Airport every day.

  • 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
SWISSPriceFrom $257Free CancellationRating
7.5
1,655 reviews
Search SWISS flights
DeltaPriceFrom $345Free CancellationRating
8.0
7,952 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $381Free CancellationRating
7.3
1,419 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,199 reviews
Search Lufthansa flights
IcelandairPriceFrom $468Free CancellationRating
7.0
514 reviews
Search Icelandair flights
JetBluePriceFrom $505Free CancellationRating
7.3
2,910 reviews
Search JetBlue flights
TAP AIR PORTUGALPriceFrom $508Free CancellationRating
7.1
1,914 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $541Free CancellationRating
7.1
1,152 reviews
Search Aer Lingus flights
FinnairPriceFrom $569Free CancellationRating
7.6
1,312 reviews
Search Finnair flights
IberiaPriceFrom $581Free CancellationRating
7.0
2,826 reviews
Search Iberia flights
  • Alaska Airlines Flights From Chicago to London Heathrow Airport

    Alaska Airlines operates around 41 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $973, but momondo users have found Alaska Airlines deals from Chicago to London Heathrow Airport from as low as $809 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.

  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair (7.6/10 from 1,312 reviews) operates around 34 flights from Chicago to London Heathrow Airport in any given week. The average Finnair airfare for this route is around $755, with deals from around $569 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
Hounslow
Gatwick
Croydon
Luton
Slough
Dover
Dartford
Guildford
Stansted
Hayes
Milton Keynes
Salisbury
Swindon
Ilford
Colchester
Stratford-upon-Avon
Chelmsford
Canterbury
Watford
Richmond

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 7/15
Tue 7/22

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