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Cheap flights from Chicago O'Hare Intl Airport to London from £291

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
25 May — 1 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in February or October, booked 71 days in advance, depart on a Sunday or Monday and return on a Wednesday

Cheap flight deals from O'Hare Intl to London

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 April 2026.

Tue 12/519:25
ORD
-
STN
2 stops19h 05m
Multiple Airlines
Tue 19/515:10
STN
-
ORD
2 stops30h 50m
Multiple Airlines
Deal found 20/4£515
Tue 29/919:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Sun 4/1015:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 20/4£516
Wed 30/916:30
ORD
-
LGW
1 stop31h 50m
Multiple Airlines
Tue 6/1013:05
LGW
-
ORD
1 stop24h 56m
Multiple Airlines
Deal found 20/4£518
Tue 12/519:25
ORD
-
LGW
2 stops21h 25m
Multiple Airlines
Tue 19/521:35
LGW
-
ORD
3 stops28h 05m
Multiple Airlines
Deal found 21/4£519
Sun 3/522:25
ORD
-
LGW
3 stops28h 15m
Multiple Airlines
Wed 27/520:50
LGW
-
ORD
3 stops28h 50m
Multiple Airlines
Deal found 20/4£520
Tue 26/509:55
ORD
-
STN
3 stops27h 40m
Multiple Airlines
Wed 3/622:00
STN
-
ORD
2 stops27h 25m
Multiple Airlines
Deal found 21/4£520
Sat 24/1020:20
ORD
-
LHR
2 stops32h 15m
Scandinavian Airlines
Tue 27/1006:40
LHR
-
ORD
2 stops16h 05m
Scandinavian Airlines
Deal found 20/4£522
Wed 30/919:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Wed 7/1015:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 20/4£522
Sat 28/1118:30
ORD
-
LGW
1 stop10h 25m
Icelandair
Sat 12/1211:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Deal found 20/4£523
Sat 28/1118:30
ORD
-
LHR
1 stop10h 20m
Icelandair
Sat 12/1212:15
LHR
-
ORD
1 stop11h 05m
Icelandair
Deal found 20/4£524
Sat 12/1218:30
ORD
-
LGW
1 stop10h 25m
Icelandair
Fri 25/1211:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Deal found 20/4£525
Sat 12/1218:30
ORD
-
LHR
1 stop10h 20m
Icelandair
Fri 25/1212:15
LHR
-
ORD
1 stop11h 05m
Icelandair
Deal found 20/4£525

Find flight deals from O'Hare Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 25 April 2026.

Round-trip from

£515

One-way from

£291

Popular in

June

Cheapest in

February

Average price

£530

Good round-trip deal

£682 or less

Good one-way deal

£398 or less
12/5-19/5
  • 12/5-19/5
  • 4 total stops
  • 49h 55m total
  • Chicago to London
Search Deals
27/7
  • 27/7
  • 2 total stops
  • 21h 30m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£127 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from O'Hare Intl 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, Cheapflights users made 858,174 searches. Data last updated 25 April 2026.
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

Cheapest return flight

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 9/6

09:55-13:25

3 stops21h 30m

London Luton

Thu 11/6

09:25-18:15

2 stops14h 50m

£596

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 21/10

20:10-22:10

1 stop20h 00m

London Stansted

Wed 28/10

06:40-19:25

1 stop17h 45m

£598

ChicagoLondon

ORD - SEN

ORDSEN

Chicago O'Hare Intl

Sun 10/5

14:15-19:35

2 stops23h 20m

London Southend

Tue 19/5

06:30-20:08

2 stops19h 38m

£600

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 27/5

09:55-12:35

3 stops20h 40m

London Luton

Tue 2/6

09:40-19:25

2 stops15h 45m

£602

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 8/9

16:05-12:55

2 stops14h 50m

London Luton

Fri 18/9

08:30-18:15

2 stops15h 45m

£610

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 18/10

15:40-10:00

1 stop12h 20m

London Heathrow

Tue 27/10

09:00-17:20

1 stop13h 20m

£640

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 11/5

09:55-17:10

2 stops25h 15m

London Luton

Fri 15/5

17:50-16:05

2 stops28h 15m

£657

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Tue 5/5

16:20-09:30

1 stop11h 10m

London City

Tue 19/5

09:20-14:15

1 stop10h 55m

£659
Fastest return journey

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 12/5

21:40-11:55

Nonstop8h 15m

London Heathrow

Wed 17/6

07:25-14:00

1 stop12h 35m

£659

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Mon 7/9

11:30-09:30

2 stops16h 00m

London City

Thu 24/9

09:20-14:15

1 stop10h 55m

£662

Flights are sorted by cheapest return flights first.

Deals found on 21/4

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from O'Hare Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from O'Hare Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to London

How far ahead should I book a flight from Chicago O'Hare Intl Airport to London?

The price you pay for your flight from Chicago O'Hare Intl Airport to London may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London?

Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of £148). Flying from Chicago O'Hare Intl Airport to London in December is currently the most expensive (average of £1,432). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to LON?

Find hourly flight availability from O'Hare Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to London as you normally would.

Weekly flight availability from Chicago O'Hare Intl Airport to London

Explore weekly flight availability from O'Hare Intl to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 25 April 2026.

The most flights from ORD to LON are scheduled on a Monday (58 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (57 on average).

How much does it cost for a return flight from Chicago O'Hare Intl Airport to London?

What’s the top stopover airport for flights from Chicago O'Hare Intl Airport to London?

Share of one-stop return flights from Chicago O'Hare Intl Airport to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 35% of one-stop itineraries from Chicago O'Hare Intl Airport to London on Cheapflights.

What’s the cheapest stopover airport for flights from Chicago O'Hare Intl Airport to London?

Average return fare for one-stop flights from Chicago O'Hare Intl Airport to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £366.

What’s the fastest stopover option from Chicago O'Hare Intl Airport to London?

Shortest average travel time for one-stop one-way flights from Chicago O'Hare Intl Airport to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 9h 50m.

Which airport typically offers the quickest stopover for flights from Chicago O'Hare Intl Airport to London?

Average stopover duration for one-stop one-way flights from Chicago O'Hare Intl Airport to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 55m.

How often are flights from Chicago to London delayed?

About 25% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 171 minutes.

What is the most punctual flight time for Chicago to London flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to London flights?

Over the past year, American Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 25 April 2026.
Get a feel of what it's like to fly with United Airlines and British Airways from Chicago O'Hare Intl Airport to London by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,653 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,653 reviews
United Airlines
7.4
Good
9,653 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
British Airways
6.7
Okay
7,914 reviews
United Airlines
7.4
Good
9,653 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago O'Hare Intl Airport to London?

    For as low as £659, United Airlines can have you in London from Chicago O'Hare Intl Airport in 11h 10m. Chicago O'Hare Intl Airport and London are separated by a distance of 3957 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London round-trip?

    According to our current data, Lufthansa (£356), American Airlines (£384), and British Airways (£421) offers the cheapest pricing from Chicago O'Hare Intl Airport to London. Users have found that Lufthansa is 36% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £164. However, be on the lookout for offers from Lufthansa and British Airways, as they are both options that can get you from Chicago O'Hare Intl Airport to London for a low price.

  • What are the most popular routes from Chicago O'Hare Intl Airport to London?

    The most popular flight routes from Chicago O'Hare Intl Airport to London are Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick and Chicago O'Hare Intl - London Stansted.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to London?

    No one likes to see their flight delayed. When booking a flight from Chicago O'Hare Intl Airport to London consider choosing Air Canada (89%), Austrian Airlines (89%) or United Airlines (89%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chicago O'Hare Intl Airport to London?

    Looking for the cheapest flight from Chicago O'Hare Intl Airport to London? While on average our users pay £578, our data indicates the cheapest price to be £359. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £450.

  • Can I find deals for flights from O'Hare Intl to London that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to London.

  • Can I find deals for business class flights from O'Hare Intl to London?

    Yes. Cheapflights offers flight deals from O'Hare Intl to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London?

    Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of £148). Flying from Chicago O'Hare Intl Airport to London in December is currently the most expensive (average of £1,432). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford
Chelmsford

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Top 6 airlines flying from O'Hare Intl to London

Discover the top 6 airlines that operate flights from O'Hare Intl to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£356Average£512FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£384Average£591FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£421Average£623FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£457Average£602FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£460Average£661FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£516Average£628FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from O'Hare Intl to London?

When you search for this flight from O'Hare Intl to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to London?

Cheapflights helps you find that perfect flight to London from O'Hare Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from O'Hare Intl to London with no change fees?

Need flexible booking options for your flight to London from O'Hare Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from O'Hare Intl to London become cheaper?

Not ready to book yet? You can track prices for flights from O'Hare Intl to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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