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Cheap flights from Chicago O'Hare Intl Airport to London from £175

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 departing on 5/11. 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 return flights

Enter your travel dates to find the best prices.
Icelandair Logo
18:30 - 19:30ORD-LHR
19h 00m1 stop
Icelandair Logo
20:35 - 17:20LHR-ORD
26h 45m1 stop
£392Icelandair
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Tue, 18 Nov - Tue, 2 Dec
Multiple Airlines Logo
18:30 - 23:05ORD-STN
22h 35m2 stops
Multiple Airlines Logo
06:30 - 17:20STN-ORD
16h 50m2 stops
£392Multiple Airlines
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Sat, 6 Dec - Sat, 13 Dec
Icelandair Logo
18:30 - 19:30ORD-LHR
19h 00m1 stop
Icelandair Logo
12:15 - 17:20LHR-ORD
11h 05m1 stop
£393Icelandair
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Wed, 31 Dec - Thu, 15 Jan
Scandinavian Airlines Logo
19:20 - 17:00ORD-LHR
39h 40m2 stops
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
£394Scandinavian Airlines
Find Deal
Mon, 3 Nov - Thu, 6 Nov
Scandinavian Airlines Logo
10:40 - 16:00ORD-LHR
23h 20m2 stops
Scandinavian Airlines Logo
06:40 - 16:45LHR-ORD
16h 05m1 stop
£395Scandinavian Airlines
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Thu, 29 Jan - Fri, 6 Feb
TAP AIR PORTUGAL Logo
19:10 - 15:05ORD-LGW
13h 55m1 stop
TAP AIR PORTUGAL Logo
16:00 - 15:25LGW-ORD
29h 25m1 stop
£410TAP AIR PORTUGAL
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Wed, 12 Nov - Thu, 20 Nov
Aer Lingus Logo
15:50 - 10:10ORD-LHR
12h 20m1 stop
Aer Lingus Logo
12:10 - 17:55LHR-ORD
11h 45m1 stop
£413Aer Lingus
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Sun, 9 Nov - Wed, 12 Nov
Aer Lingus Logo
16:50 - 08:05ORD-LHR
10h 15m1 stop
Aer Lingus Logo
08:50 - 14:00LHR-ORD
11h 10m1 stop
£415Aer Lingus
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Tue, 28 Oct - Tue, 4 Nov
TAP AIR PORTUGAL Logo
20:25 - 20:35ORD-LGW
18h 10m2 stops
TAP AIR PORTUGAL Logo
16:35 - 14:45LGW-ORD
28h 10m1 stop
£433TAP AIR PORTUGAL
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Sun, 30 Nov - Sat, 6 Dec
Lufthansa Logo
22:35 - 17:40ORD-LCY
13h 05m1 stop
Lufthansa Logo
09:50 - 20:05LCY-ORD
16h 15m1 stop
£483Lufthansa
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Mon, 3 Nov - Wed, 12 Nov

Aer Lingus flights from Chicago O'Hare Intl Airport to London

Our best Aer Lingus deals on Chicago O'Hare Intl Airport to London flight tickets
Aer Lingus
26 Oct
ORD16:50Chicago O'Hare Intl
10h 15m
1 stop
LHR08:05London Heathrow
4 Nov
LHR08:50London Heathrow
11h 10m
1 stop
ORD14:00Chicago O'Hare Intl
£410
Find similar
Aer Lingus
29 Oct
ORD16:50Chicago O'Hare Intl
11h 15m
1 stop
LHR09:05London Heathrow
4 Nov
LHR12:10London Heathrow
11h 45m
1 stop
ORD17:55Chicago O'Hare Intl
£412
Find similar
Aer Lingus
9 Nov
ORD15:50Chicago O'Hare Intl
12h 20m
1 stop
LHR10:10London Heathrow
12 Nov
LHR12:10London Heathrow
11h 45m
1 stop
ORD17:55Chicago O'Hare Intl
£413
Find similar

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

Our best Scandinavian Airlines deals on Chicago O'Hare Intl Airport to London flight tickets
Scandinavian Airlines
3 Nov
ORD19:20Chicago O'Hare Intl
39h 40m
2 stops
LHR17:00London Heathrow
6 Nov
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
£394
Find similar
Scandinavian Airlines
29 Jan
ORD10:40Chicago O'Hare Intl
23h 20m
2 stops
LHR16:00London Heathrow
6 Feb
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
£395
Find similar
Scandinavian Airlines
26 Feb
ORD10:40Chicago O'Hare Intl
16h 40m
2 stops
LHR09:20London Heathrow
2 Mar
LHR06:40London Heathrow
16h 05m
1 stop
ORD16:45Chicago O'Hare Intl
£395
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chicago O'Hare Intl Airport to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 17 October 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/11

18:30-19:30

1 stop19h 00m

London Heathrow

Tue 2/12

20:35-17:20

1 stop26h 45m

£392

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sat 6/12

18:30-23:05

2 stops22h 35m

London Stansted

Sat 13/12

06:30-17:20

2 stops16h 50m

£392

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 31/12

18:30-19:30

1 stop19h 00m

London Heathrow

Thu 15/1

12:15-17:20

1 stop11h 05m

£393

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 3/11

19:20-17:00

2 stops39h 40m

London Heathrow

Thu 6/11

06:40-16:45

1 stop16h 05m

£394

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 29/1

10:40-16:00

2 stops23h 20m

London Heathrow

Fri 6/2

06:40-16:45

1 stop16h 05m

£395

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 12/11

19:10-15:05

1 stop13h 55m

London Gatwick

Thu 20/11

16:00-15:25

1 stop29h 25m

£410

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/11

15:50-10:10

1 stop12h 20m

London Heathrow

Wed 12/11

12:10-17:55

1 stop11h 45m

£413

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 28/10

16:50-08:05

1 stop10h 15m

London Heathrow

Tue 4/11

08:50-14:00

1 stop11h 10m

£415

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 30/11

20:25-20:35

2 stops18h 10m

London Gatwick

Sat 6/12

16:35-14:45

1 stop28h 10m

£433

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Mon 3/11

22:35-17:40

1 stop13h 05m

London City

Wed 12/11

09:50-20:05

1 stop16h 15m

£483

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to London

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?

The cheapest month to fly to London from Chicago O'Hare Intl Airport is in April. Flight prices, which tend to average around £483, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Chicago O'Hare Intl Airport averaging around £485.

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

Our data shows that Thursday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £514. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to London for around £661.

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

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £563. Flights at midday are often more expensive, with an average ticket price of £815.

What is the cheapest Chicago O'Hare Intl to London flight route?

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

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

You are more likely to see cheaper flights to London from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £593 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Chicago O'Hare Intl Airport for as low as £518 on momondo.

What cabin class options are available on Chicago O'Hare Intl to London flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl to London 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 O'Hare Intl Airport to London flights?

You could potentially save up to 37% on your flight if you consider stops on a Chicago O'Hare Intl Airport to London flight.

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

As of October 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 10% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to London

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

Cheap Chicago O'Hare Intl Airport to London (ORD to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to London

Best price found

£293

Fastest flight time

7h 40m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Chicago O'Hare Intl Airport in the past 72 hours is £293. The best return flight deal from Chicago O'Hare Intl Airport to London found on momondo in the last 72 hours is £423.
The fastest flight from Chicago O'Hare Intl Airport to London takes 7h 40m
Direct flights go from Chicago O'Hare Intl Airport to London every day.
There is 1 airport near London: London Heathrow (LHR)
Search flight deals

  • How far is Chicago O'Hare Intl to London by plane?

    There are 3950.9 mi between Chicago O'Hare Intl and London. Typically, this will take 9h 45m by plane in normal conditions.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to London?

    Prices for flights from Chicago O'Hare Intl Airport to London were last updated today.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to London?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to London?

    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.

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

    The travel and health documents you'll need for your trip to London 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. 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?

  • What is the most popular airline from Chicago O'Hare Intl Airport to London?

Best airlines flying from Chicago O'Hare Intl Airport to London

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to London with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £358Free CancellationRating
6.8
7,500 reviews
Search Lufthansa flights
American AirlinesPriceFrom £385Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
FinnairPriceFrom £414Free CancellationRating
7.6
1,332 reviews
Search Finnair flights
IberiaPriceFrom £446Free CancellationRating
7.0
2,995 reviews
Search Iberia flights
British AirwaysPriceFrom £450Free CancellationRating
6.7
7,459 reviews
Search British Airways flights
United AirlinesPriceFrom £462Free CancellationRating
7.4
8,984 reviews
Search United Airlines flights
Aer LingusPriceFrom £493Free CancellationRating
7.2
1,341 reviews
Search Aer Lingus flights

  • Finnair Flights From Chicago O'Hare Intl Airport to London

    Finnair flight deals from Chicago O'Hare Intl Airport to London start from £556 round-trip. Over the 28 Finnair flights for this route in a normal week, average airfare is usually £904 round-trip - but some users have found much cheaper deals with momondo.

  • United Airlines Flights From Chicago O'Hare Intl Airport to London

    Another popular option for Chicago O'Hare Intl Airport to London flights is United Airlines (7.4/10, 8,984 ratings). United Airlines flies from Chicago O'Hare Intl Airport to London around 21 times per week, with deals starting from £621 round-trip and rising to an average price of around £828.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Dover
Hayes
Chelmsford
Worthing
Dartford
Bedford
Ramsgate
Stansted

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?

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 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 simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Chicago and alert you when they change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport