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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from $223

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 Heathrow Airport departing on 7/21. 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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Find the cheapest flights from Chicago O'Hare Intl Airport to London

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Chicago O'Hare Intl Airport to London.
Scandinavian Airlines Logo
7:15 pm - 5:40 pmORD-LHR
16h 25m1 stop
Scandinavian Airlines Logo
6:40 am - 4:10 pmLHR-ORD
15h 30m1 stop
$423Scandinavian Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Scandinavian Airlines Logo
7:15 pm - 9:40 pmORD-LHR
20h 25m1 stop
Scandinavian Airlines Logo
6:40 pm - 4:10 pmLHR-ORD
27h 30m1 stop
$424Scandinavian Airlines
Find Deal
Mon, Sep 22 - Mon, Sep 29
Scandinavian Airlines Logo
7:15 pm - 4:00 pmORD-LHR
14h 45m1 stop
Scandinavian Airlines Logo
7:05 am - 4:10 pmLHR-ORD
15h 05m2 stops
$426Scandinavian Airlines
Find Deal
Mon, Oct 6 - Mon, Oct 13
Scandinavian Airlines Logo
7:15 pm - 4:25 pmORD-LHR
15h 10m2 stops
Scandinavian Airlines Logo
7:05 am - 4:10 pmLHR-ORD
15h 05m2 stops
$429Scandinavian Airlines
Find Deal
Mon, Oct 6 - Mon, Oct 13
British Airways Logo
7:10 pm - 9:05 amORD-LHR
7h 55mnonstop
British Airways Logo
3:30 pm - 6:15 pmLHR-ORD
8h 45mnonstop
$604British Airways
Find Deal
Tue, Aug 5 - Wed, Aug 20
Iberia Logo
3:16 pm - 7:50 amORD-LHR
10h 34m1 stop
Iberia Logo
9:15 am - 11:50 amLHR-ORD
8h 35mnonstop
$605Iberia
Find Deal
Tue, Aug 5 - Wed, Aug 20
Iberia Logo
4:42 pm - 10:20 amORD-LHR
11h 38m1 stop
Iberia Logo
11:05 am - 1:50 pmLHR-ORD
8h 45mnonstop
$643Iberia
Find Deal
Wed, Aug 13 - Wed, Aug 20
American Airlines Logo
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
American Airlines Logo
7:40 am - 3:45 pmLHR-ORD
14h 05m1 stop
$651American Airlines
Find Deal
Tue, Aug 19 - Thu, Aug 28
British Airways Logo
7:15 pm - 9:10 amORD-LHR
7h 55mnonstop
British Airways Logo
9:15 am - 11:50 amLHR-ORD
8h 35mnonstop
$654British Airways
Find Deal
Wed, Jul 23 - Tue, Aug 19
United Airlines Logo
6:00 pm - 8:20 amORD-LHR
8h 20mnonstop
United Airlines Logo
8:40 am - 12:10 pmLHR-ORD
33h 30m1 stop
$664United Airlines
Find Deal
Mon, Oct 6 - Mon, Oct 13

TAP AIR PORTUGAL flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
TAP AIR PORTUGAL
Oct 16
ORD6:00 pmChicago O'Hare Intl
18h 50m
1 stop
LHR6:50 pmLondon Heathrow
Oct 28
LHR6:30 pmLondon Heathrow
26h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
TAP AIR PORTUGAL
Oct 8
ORD6:00 pmChicago O'Hare Intl
22h 00m
1 stop
LHR10:00 pmLondon Heathrow
Oct 15
LHR7:50 pmLondon Heathrow
22h 45m
1 stop
ORD12:35 pmChicago O'Hare Intl
TAP AIR PORTUGAL
Sep 27
ORD6:15 pmChicago O'Hare Intl
22h 40m
1 stop
LHR10:55 pmLondon Heathrow
Oct 4
LHR6:45 pmLondon Heathrow
27h 25m
1 stop
ORD4:10 pmChicago O'Hare Intl

Scandinavian Airlines flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Our best Scandinavian Airlines deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
Scandinavian Airlines
Sep 23
ORD7:15 pmChicago O'Hare Intl
16h 25m
1 stop
LHR5:40 pmLondon Heathrow
Sep 30
LHR6:40 amLondon Heathrow
15h 30m
1 stop
ORD4:10 pmChicago O'Hare Intl
Scandinavian Airlines
Sep 22
ORD7:15 pmChicago O'Hare Intl
20h 25m
1 stop
LHR9:40 pmLondon Heathrow
Sep 29
LHR6:40 pmLondon Heathrow
27h 30m
1 stop
ORD4:10 pmChicago O'Hare Intl
Scandinavian Airlines
Oct 6
ORD7:15 pmChicago O'Hare Intl
14h 45m
1 stop
LHR4:00 pmLondon Heathrow
Oct 13
LHR7:05 amLondon Heathrow
15h 05m
2 stops
ORD4:10 pmChicago O'Hare Intl

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 October is, on average, the cheapest month to fly to London Heathrow Airport from Chicago O'Hare Intl Airport, with most prices found around $670. If you’re not able to fly to London Heathrow Airport in October, then February is your next best option. Flight prices from Chicago O'Hare Intl Airport to London Heathrow Airport during February average around $672.

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 $772. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $885.

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 $728. 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 $836.

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 3 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $784 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 O'Hare Intl Airport for as low as $712 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.

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

As of April 2025, prices for Chicago O'Hare Intl Airport to London Heathrow Airport flights are approximately 1% cheaper 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

$223

Fastest flight time

7h 50m

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 $223. 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 $423.
The fastest flight from Chicago O'Hare Intl Airport to London Heathrow Airport takes 7h 50m
Direct flights go from Chicago O'Hare Intl Airport to London Heathrow Airport every day.

  • 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 55m.

  • 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
SWISSPriceFrom $257Free CancellationRating
7.5
1,582 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $381Free CancellationRating
7.3
1,344 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $468Free CancellationRating
7.0
484 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $506Free CancellationRating
7.1
1,844 reviews
Search TAP AIR PORTUGAL flights
JetBluePriceFrom $516Free CancellationRating
7.3
2,924 reviews
Search JetBlue flights
LufthansaPriceFrom $547Free CancellationRating
6.7
7,027 reviews
Search Lufthansa flights
Air CanadaPriceFrom $554Free CancellationRating
7.0
9,192 reviews
Search Air Canada flights
FinnairPriceFrom $558Free CancellationRating
7.6
1,272 reviews
Search Finnair flights
IberiaPriceFrom $578Free CancellationRating
7.0
2,684 reviews
Search Iberia flights
Aer LingusPriceFrom $585Free CancellationRating
7.0
1,068 reviews
Search Aer Lingus flights
  • Alaska Airlines Flights From Chicago O'Hare Intl Airport to London Heathrow Airport

    Alaska Airlines operates around 36 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 $973, but momondo users have found Alaska Airlines deals from Chicago O'Hare Intl Airport to London Heathrow Airport from as low as $809 round-trip. Alaska Airlines has been scored 8.0/10 in 9,911 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, 1,272 ratings). Finnair flies from Chicago O'Hare Intl Airport to London Heathrow Airport around 33 times per week, with deals starting from $558 round-trip and rising to an average price of around $710.


Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Croydon
Luton
Guildford
Slough
Hayes
Dartford
Dover
Stansted
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Salisbury
Milton Keynes
Canterbury
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Swindon
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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.


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