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Cheap flights from Chicago to London Heathrow Airport from £168

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 Heathrow Airport departing on 21/7. 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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0 bags

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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Chicago to London.
Scandinavian Airlines Logo
19:15 - 08:55ORD-LHR
31h 40m2 stops
Scandinavian Airlines Logo
06:40 - 16:10LHR-ORD
15h 30m1 stop
£295Scandinavian Airlines
Find Deal
Sat, 27 Sep - Tue, 30 Sep
Scandinavian Airlines Logo
19:15 - 17:40ORD-LHR
16h 25m1 stop
Scandinavian Airlines Logo
06:40 - 16:10LHR-ORD
15h 30m1 stop
£318Scandinavian Airlines
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Scandinavian Airlines Logo
19:15 - 21:40ORD-LHR
20h 25m1 stop
Scandinavian Airlines Logo
18:40 - 16:10LHR-ORD
27h 30m1 stop
£319Scandinavian Airlines
Find Deal
Mon, 22 Sep - Mon, 29 Sep
TAP AIR PORTUGAL Logo
18:00 - 22:55ORD-LHR
22h 55m1 stop
TAP AIR PORTUGAL Logo
06:00 - 16:10LHR-ORD
16h 10m1 stop
£416TAP AIR PORTUGAL
Find Deal
Fri, 10 Oct - Wed, 22 Oct
Aer Lingus Logo
15:45 - 08:00ORD-LHR
10h 15m1 stop
Aer Lingus Logo
13:25 - 19:00LHR-ORD
11h 35m1 stop
£432Aer Lingus
Find Deal
Tue, 5 Aug - Wed, 20 Aug
TAP AIR PORTUGAL Logo
18:00 - 22:00ORD-LHR
22h 00m1 stop
TAP AIR PORTUGAL Logo
19:50 - 12:35LHR-ORD
22h 45m1 stop
£449TAP AIR PORTUGAL
Find Deal
Wed, 8 Oct - Wed, 15 Oct
British Airways Logo
19:10 - 09:05ORD-LHR
7h 55mdirect
British Airways Logo
12:30 - 15:05LHR-ORD
8h 35mdirect
£452British Airways
Find Deal
Tue, 5 Aug - Wed, 20 Aug
Iberia Logo
14:30 - 08:05ORD-LHR
11h 35m1 stop
Iberia Logo
11:05 - 13:50LHR-ORD
8h 45mdirect
£452Iberia
Find Deal
Tue, 5 Aug - Wed, 20 Aug
British Airways Logo
19:10 - 09:05ORD-LHR
7h 55mdirect
British Airways Logo
15:30 - 18:15LHR-ORD
8h 45mdirect
£454British Airways
Find Deal
Tue, 5 Aug - Wed, 20 Aug
Aer Lingus Logo
21:15 - 13:25ORD-LHR
10h 10m1 stop
Aer Lingus Logo
08:50 - 14:00LHR-ORD
11h 10m1 stop
£466Aer Lingus
Find Deal
Sun, 11 May - Tue, 20 May

Scandinavian Airlines flights from Chicago to London Heathrow Airport

Our best Scandinavian Airlines deals on Chicago to London Heathrow Airport flight tickets
Scandinavian Airlines
27 Sept
ORD19:15Chicago O'Hare Intl
31h 40m
2 stops
LHR08:55London Heathrow
30 Sept
LHR06:40London Heathrow
15h 30m
1 stop
ORD16:10Chicago O'Hare Intl
Scandinavian Airlines
23 Sept
ORD19:15Chicago O'Hare Intl
16h 25m
1 stop
LHR17:40London Heathrow
30 Sept
LHR06:40London Heathrow
15h 30m
1 stop
ORD16:10Chicago O'Hare Intl
Scandinavian Airlines
22 Sept
ORD19:15Chicago O'Hare Intl
20h 25m
1 stop
LHR21:40London Heathrow
29 Sept
LHR18:40London Heathrow
27h 30m
1 stop
ORD16:10Chicago O'Hare Intl

Aer Lingus flights from Chicago to London Heathrow Airport

Our best Aer Lingus deals on Chicago to London Heathrow Airport flight tickets
Aer Lingus
5 Aug
ORD15:45Chicago O'Hare Intl
10h 15m
1 stop
LHR08:00London Heathrow
20 Aug
LHR13:25London Heathrow
11h 35m
1 stop
ORD19:00Chicago O'Hare Intl
Aer Lingus
11 May
ORD21:15Chicago O'Hare Intl
10h 10m
1 stop
LHR13:25London Heathrow
20 May
LHR08:50London Heathrow
11h 10m
1 stop
ORD14:00Chicago O'Hare Intl
Aer Lingus
30 Apr
ORD21:15Chicago O'Hare Intl
10h 10m
1 stop
LHR13:25London Heathrow
7 May
LHR08:50London Heathrow
11h 10m
1 stop
ORD14:00Chicago 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?

In general, November is the cheapest month to fly from Chicago to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £498. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Chicago averaging around £502.

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

On average, the least expensive day to fly to London Heathrow Airport from Chicago is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £537. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £670.

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 at midday. momondo users have found flights departing from Chicago to London Heathrow Airport at midday for as low as £580. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £631 on average. Flights to London Heathrow Airport from Chicago in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 3 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £589 when searching 3 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 £535 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.

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

As of April 2025, prices for Chicago to London Heathrow Airport flights are approximately 26% 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 return 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

£168

Fastest flight time

7h 35m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Chicago in the past 72 hours is £168. The best return flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is £295.
The fastest flight from Chicago to London Heathrow Airport takes 7h 35m
Direct flights go from Chicago to London Heathrow Airport every day.

  • How far is Chicago to London Heathrow by plane?

    A flight from Chicago to London Heathrow will travel around 3933.5 mi. 7h 55m is a normal flight duration for this route.

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

    Prices for flights from Chicago to London Heathrow Airport were last updated today.

  • 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?

    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 to London Heathrow Airport.

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

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
FinnairPriceFrom £359Free CancellationRating
7.6
1,272 reviews
Search Finnair flights
American AirlinesPriceFrom £386Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom £450Free CancellationRating
7.0
2,686 reviews
Search Iberia flights
British AirwaysPriceFrom £480Free CancellationRating
6.6
6,815 reviews
Search British Airways flights
LufthansaPriceFrom £489Free CancellationRating
6.7
7,029 reviews
Search Lufthansa flights
United AirlinesPriceFrom £500Free CancellationRating
7.4
8,685 reviews
Search United Airlines flights
  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair is one of the most popular airlines flying from Chicago to London Heathrow Airport, operating 30 flights/week on average for this route. A good Finnair flight deal for Chicago to London Heathrow Airport starts from £478 round-trip, up to an average price of £927. Our users have rated Finnair at 7.6/10.

  • United Airlines Flights From Chicago to London Heathrow Airport

    The best United Airlines deal for Chicago to London Heathrow Airport flight tickets found on momondo in the last 72 hours was £666, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at £942 round-trip. United Airlines operates 21 flights out of Chicago into London Heathrow Airport in an average week, so prices vary by time and availability. 8,685 United Airlines reviews by users on momondo have scored the airline at 7.4/10.


Travelling to a place near London?

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Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to London. momondo saves you time and could save you money on your trip.

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?

Once all potential Chicago to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Chicago to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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