Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Heathrow Airport to Chicago from $689

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Chicago departing on 25/8. 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

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise 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 London Heathrow Airport to Chicago

Cheap return flights

Brussels Airlines Logo
11:05 - 14:10LHR-ORD
9h 05mdirect
Brussels Airlines Logo
18:00 - 08:20ORD-LHR
8h 20mdirect
$689Brussels Airlines
Find Deal
Mon, 25 Aug - Tue, 9 Sep
TAP AIR PORTUGAL Logo
08:00 - 16:30LHR-ORD
14h 30m1 stop
TAP AIR PORTUGAL Logo
18:10 - 22:00ORD-LHR
21h 50m1 stop
$796TAP AIR PORTUGAL
Find Deal
Sat, 23 Aug - Mon, 25 Aug
JetBlue Logo
08:15 - 18:24LHR-ORD
16h 09m1 stop
JetBlue Logo
13:36 - 09:30ORD-LHR
13h 54m1 stop
$820JetBlue
Find Deal
Sat, 6 Sep - Mon, 15 Sep
JetBlue Logo
08:15 - 20:49LHR-ORD
18h 34m1 stop
JetBlue Logo
13:36 - 09:30ORD-LHR
13h 54m1 stop
$830JetBlue
Find Deal
Fri, 5 Sep - Mon, 15 Sep
Scandinavian Airlines Logo
19:50 - 17:45LHR-ORD
26h 55m2 stops
Scandinavian Airlines Logo
19:20 - 16:00ORD-LHR
14h 40m1 stop
$831Scandinavian Airlines
Find Deal
Fri, 31 Oct - Sat, 8 Nov
Scandinavian Airlines Logo
07:05 - 16:45LHR-ORD
15h 40m2 stops
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
$836Scandinavian Airlines
Find Deal
Thu, 6 Nov - Sun, 9 Nov
Icelandair Logo
13:05 - 18:15LHR-ORD
11h 10m1 stop
Icelandair Logo
19:25 - 11:55ORD-LHR
10h 30m1 stop
$863Icelandair
Find Deal
Wed, 17 Sep - Tue, 30 Sep
Icelandair Logo
21:25 - 21:15LHR-ORD
29h 50m1 stop
Icelandair Logo
19:25 - 11:55ORD-LHR
10h 30m1 stop
$866Icelandair
Find Deal
Sat, 20 Sep - Tue, 30 Sep
United Airlines Logo
08:55 - 16:15LHR-ORD
13h 20m1 stop
United Airlines Logo
18:20 - 10:50ORD-LHR
10h 30m1 stop
$869United Airlines
Find Deal
Mon, 3 Nov - Sat, 8 Nov
United Airlines Logo
06:30 - 14:55LHR-ORD
14h 25m1 stop
United Airlines Logo
21:25 - 11:45ORD-LHR
8h 20mdirect
$880United Airlines
Find Deal
Sun, 24 Aug - Tue, 9 Sep

TAP AIR PORTUGAL flights from London Heathrow Airport to Chicago

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Chicago flight tickets
TAP AIR PORTUGAL
23 Aug
LHR08:00London Heathrow
14h 30m
1 stop
ORD16:30Chicago O'Hare Intl
25 Aug
ORD18:10Chicago O'Hare Intl
21h 50m
1 stop
LHR22:00London Heathrow
TAP AIR PORTUGAL
31 Aug
LHR08:00London Heathrow
14h 15m
1 stop
ORD16:15Chicago O'Hare Intl
5 Sept
ORD18:00Chicago O'Hare Intl
12h 45m
1 stop
LHR12:45London Heathrow
TAP AIR PORTUGAL
3 Sept
LHR18:45London Heathrow
23h 50m
1 stop
ORD12:35Chicago O'Hare Intl
31 Oct
ORD21:15Chicago O'Hare Intl
20h 25m
1 stop
LHR22:40London Heathrow

Scandinavian Airlines flights from London Heathrow Airport to Chicago

Our best Scandinavian Airlines deals on London Heathrow Airport to Chicago flight tickets
Scandinavian Airlines
31 Oct
LHR19:50London Heathrow
26h 55m
2 stops
ORD17:45Chicago O'Hare Intl
8 Nov
ORD19:20Chicago O'Hare Intl
14h 40m
1 stop
LHR16:00London Heathrow
Scandinavian Airlines
6 Nov
LHR07:05London Heathrow
15h 40m
2 stops
ORD16:45Chicago O'Hare Intl
9 Nov
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow
Scandinavian Airlines
18 Nov
LHR19:50London Heathrow
26h 55m
2 stops
ORD16:45Chicago O'Hare Intl
26 Nov
ORD19:20Chicago O'Hare Intl
15h 05m
2 stops
LHR16:25London Heathrow

See travel insights to Chicago from

How to get the cheapest flight ticket from London Heathrow Airport to Chicago

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 Chicago?

If you don’t want to visit Chicago in February, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $928.

What is the cheapest day to depart on your flight to Chicago?

Our data shows that Wednesday is the least expensive day to fly to Chicago. Tickets to fly out on this day can be as low as $1,138. Flights from London Heathrow Airport to Chicago on a Saturday will generally be more expensive and average around $1,571. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Chicago?

Our data shows that the cheapest London Heathrow Airport to Chicago flights are usually those with departure times at midday. Our users have found flights to Chicago at midday for as low as $990. Flights in the morning are often more expensive, with an average ticket price of $1,186.

What is the cheapest London Heathrow to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - Chicago flight prices

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $1,133 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London Heathrow Airport for as low as $1,076 on momondo.

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

There are 2 cabin classes available to choose from on London Heathrow to Chicago 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 London Heathrow Airport to Chicago flights?

You could potentially save up to 50% on your flight if you consider stops on a London Heathrow Airport to Chicago flight.

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

As of July 2025, prices for London Heathrow Airport to Chicago flights are approximately 9% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Chicago according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Chicago (LHR to CHI) flight deals and tips

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

Best price found

$980

Fastest flight time

8h 45m

Direct flights

Every day

Airports in Chicago

1 airport
The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is $980. The best return flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is $689.
The fastest flight from London Heathrow Airport to Chicago takes 8h 45m
Direct flights go from London Heathrow Airport to Chicago every day.
There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)

  • How far is London Heathrow to Chicago by plane?

    A flight from London Heathrow to Chicago will travel around 6330.3 km. Flights usually cover this in 8h 55m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from London Heathrow Airport to Chicago are updated daily.

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

    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 stopovers 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 London Heathrow Airport to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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


Why use momondo?

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

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

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

All flight searches from London to Chicago on momondo can be filtered to show those which offer flexible booking policies.

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

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 London to Chicago.

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

Price alerts on flights to Chicago from London 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.


An easier way to manage your Chicago trip

We make it super easy to schedule, organise 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 15/7
Tue 22/7

Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 25.6 km from Chicago