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Cheap flights from Chicago to London Heathrow Airport from $247

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 4/8. 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

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Find the cheapest flights from Chicago to London

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Chicago to London.
2:20 pm - 7:55 amORD-LHR
11h 35m1 stop
6:40 pm - 3:55 pmLHR-ORD
27h 15m1 stop
$265SWISS
Find Deal
Tue, Apr 29 - Tue, May 6
7:15 pm - 4:00 pmORD-LHR
14h 45m1 stop
6:40 pm - 4:10 pmLHR-ORD
27h 30m1 stop
$453Scandinavian Airlines
Find Deal
Tue, Sep 2 - Wed, Sep 10
4:42 pm - 10:20 amORD-LHR
11h 38m1 stop
2:25 pm - 5:00 pmLHR-ORD
8h 35mnonstop
$605Iberia
Find Deal
Tue, Aug 5 - Wed, Aug 20
8:20 pm - 10:30 amORD-LHR
8h 10mnonstop
1:10 pm - 3:55 pmLHR-ORD
8h 45mnonstop
$606British Airways
Find Deal
Sun, May 4 - Thu, May 15
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
7:40 am - 3:45 pmLHR-ORD
14h 05m1 stop
$645American Airlines
Find Deal
Mon, Aug 4 - Thu, Sep 25
7:10 pm - 9:05 amORD-LHR
7h 55mnonstop
2:25 pm - 5:00 pmLHR-ORD
8h 35mnonstop
$646British Airways
Find Deal
Thu, May 1 - Tue, May 6
3:14 pm - 7:50 amORD-LHR
10h 36m1 stop
12:15 pm - 2:50 pmLHR-ORD
8h 35mnonstop
$652Iberia
Find Deal
Thu, Sep 25 - Tue, Oct 7
9:20 pm - 11:45 amORD-LHR
8h 25mnonstop
1:45 pm - 3:55 pmLHR-ORD
32h 10m1 stop
$657United Airlines
Find Deal
Sun, May 4 - Mon, May 19
11:30 am - 10:00 amORD-LHR
16h 30m1 stop
1:30 pm - 7:55 pmLHR-ORD
12h 25m1 stop
$662United Airlines
Find Deal
Tue, Apr 22 - Thu, May 1
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
7:40 am - 3:45 pmLHR-ORD
14h 05m1 stop
$680American Airlines
Find Deal
Tue, Aug 19 - Thu, Aug 28

SWISS flights from Chicago to London Heathrow Airport

Our best SWISS deals on Chicago to London Heathrow Airport flight tickets
SWISS
Apr 29
ORD2:20 pmChicago O'Hare Intl
11h 35m
1 stop
LHR7:55 amLondon Heathrow
May 6
LHR6:40 pmLondon Heathrow
27h 15m
1 stop
ORD3:55 pmChicago O'Hare Intl
SWISS
Apr 6
ORD9:20 pmChicago O'Hare Intl
8h 25m
LHR11:45 amLondon Heathrow
Apr 12
LHR8:05 pmLondon Heathrow
22h 05m
1 stop
ORD12:10 pmChicago O'Hare Intl

Scandinavian Airlines flights from Chicago to London Heathrow Airport

Our best Scandinavian Airlines deals on Chicago to London Heathrow Airport flight tickets
Scandinavian Airlines
Sep 2
ORD7:15 pmChicago O'Hare Intl
14h 45m
1 stop
LHR4:00 pmLondon Heathrow
Sep 10
LHR6:40 pmLondon Heathrow
27h 30m
1 stop
ORD4:10 pmChicago O'Hare Intl
Scandinavian Airlines
Sep 22
ORD7:15 pmChicago O'Hare Intl
17h 35m
2 stops
LHR6:50 pmLondon Heathrow
Oct 21
LHR6:40 amLondon Heathrow
15h 30m
1 stop
ORD4:10 pmChicago O'Hare Intl
Scandinavian Airlines
Sep 22
ORD7:15 pmChicago O'Hare Intl
15h 10m
2 stops
LHR4:25 pmLondon Heathrow
Oct 21
LHR6:40 amLondon Heathrow
15h 30m
2 stops
ORD4:10 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 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 $669. 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 Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $776. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $886.

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 $731. 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 evening are often more expensive with an average ticket price of $840.

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 $790 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 $728 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 March 2025, prices for Chicago to London Heathrow Airport flights are approximately 61% 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

$247

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 $247. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $265.
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?

    There are 3933.5 mi between Chicago and London Heathrow. A reasonable flight in good conditions will take 7h 35m.

  • 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
1,570 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $381Free CancellationRating
7.3
1,326 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $451Free CancellationRating
8.0
7,899 reviews
Search Delta flights
IcelandairPriceFrom $466Free CancellationRating
7.0
476 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $506Free CancellationRating
7.1
1,831 reviews
Search TAP AIR PORTUGAL flights
JetBluePriceFrom $516Free CancellationRating
7.3
2,924 reviews
Search JetBlue flights
LufthansaPriceFrom $547Free CancellationRating
6.7
6,961 reviews
Search Lufthansa flights
Air CanadaPriceFrom $554Free CancellationRating
7.0
9,012 reviews
Search Air Canada flights
FinnairPriceFrom $560Free CancellationRating
7.6
1,267 reviews
Search Finnair flights
IberiaPriceFrom $581Free CancellationRating
7.0
2,653 reviews
Search Iberia flights
  • Alaska Airlines Flights From Chicago to London Heathrow Airport

    Alaska Airlines operates around 32 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $1,026, 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 9,818 reviews.

  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair (7.6/10 from 1,267 reviews) operates around 27 flights from Chicago to London Heathrow Airport in any given week. The average Finnair airfare for this route is around $727, with deals from around $560 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
Guildford
Hayes
Slough
Dartford
Stansted
Ilford
Salisbury
Swindon
Dover
Canterbury
Colchester
Milton Keynes
Horley
Wembley
Chelmsford
Eastbourne

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.


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