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Cheap flights from Chicago O'Hare Intl Airport to London from £227

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
27 Aug — 3 Sep1
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 January, booked 41 days in advance, depart on a Monday or Sunday and return on a Thursday

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 28 July 2026.

Thu 29/1019:30
ORD
-
LHR
1 stop10h 20m
Icelandair
Tue 10/1112:15
LHR
-
ORD
1 stop11h 05m
Icelandair
Deal found 26/7£522
Sun 23/819:25
ORD
-
LTN
2 stops20h 55m
Multiple Airlines
Wed 9/908:00
LTN
-
ORD
2 stops34h 40m
Multiple Airlines
Deal found 26/7£522
Thu 29/1019:30
ORD
-
LGW
1 stop10h 25m
Icelandair
Mon 2/1111:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Deal found 26/7£522
Sat 3/1019:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Wed 7/1013:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Deal found 26/7£523
Sun 1/1118:30
ORD
-
LTN
1 stop14h 35m
Multiple Airlines
Sat 7/1107:00
LTN
-
ORD
1 stop16h 20m
Multiple Airlines
Deal found 23/7£523
Thu 10/1218:30
ORD
-
LGW
1 stop10h 25m
Icelandair
Wed 16/1211:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Deal found 23/7£523
Sun 23/819:25
ORD
-
STN
2 stops22h 15m
Multiple Airlines
Tue 1/918:55
STN
-
ORD
2 stops32h 25m
Multiple Airlines
Deal found 26/7£523
Wed 28/1019:30
ORD
-
LHR
1 stop10h 20m
Icelandair
Wed 4/1112:15
LHR
-
ORD
1 stop11h 05m
Icelandair
Deal found 23/7£524
Wed 23/918:00
ORD
-
LTN
2 stops19h 55m
Multiple Airlines
Wed 30/915:15
LTN
-
ORD
2 stops27h 25m
Multiple Airlines
Deal found 25/7£524
Tue 18/819:25
ORD
-
STN
2 stops21h 15m
Multiple Airlines
Mon 24/822:45
STN
-
ORD
2 stops24h 12m
Multiple Airlines
Deal found 23/7£524
Thu 8/1019:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Thu 15/1021:25
LHR
-
ORD
1 stop30h 00m
Icelandair
Deal found 25/7£525
Wed 9/922:25
ORD
-
STN
2 stops16h 10m
Multiple Airlines
Wed 16/915:30
STN
-
ORD
2 stops27h 10m
Multiple Airlines
Deal found 26/7£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 28 July 2026.

Round-trip from

£522

One-way from

£227

Popular in

June

Cheapest in

February

Average price

£779

Good round-trip deal

£817 or less

Good one-way deal

£280 or less
23/8-9/9
  • 23/8-9/9
  • 4 total stops
  • 55h 35m total
  • Chicago to London
Search Deals
Icelandair
  • Icelandair
  • 26/9
  • 1 total stop
  • 10h 30m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (£188 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 28 July 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

Sun 1/11

18:30-15:05

1 stop14h 35m

London Luton

Sat 14/11

07:00-17:20

1 stop16h 20m

£541

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 23/8

19:25-22:20

2 stops20h 55m

London Luton

Tue 1/9

09:40-19:52

2 stops16h 12m

£543

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 25/10

16:55-09:10

1 stop11h 15m

London Luton

Sun 1/11

21:45-17:20

2 stops25h 35m

£550

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 6/12

18:30-15:05

1 stop14h 35m

London Luton

Sat 12/12

07:00-17:20

1 stop16h 20m

£553

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Thu 10/9

18:00-23:25

2 stops23h 25m

London Luton

Tue 22/9

16:10-16:00

2 stops29h 50m

£570

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 28/9

16:55-14:05

1 stop15h 10m

London Luton

Fri 2/10

05:55-17:50

2 stops17h 55m

£581

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 24/10

19:15-19:30

1 stop18h 15m

London Heathrow

Sat 7/11

17:30-16:45

2 stops29h 15m

£612

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Tue 17/11

20:15-16:20

1 stop38h 05m

London Stansted

Tue 24/11

17:20-10:00

1 stop22h 40m

£625

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 30/9

20:10-09:55

1 stop31h 45m

London Stansted

Wed 7/10

06:55-09:40

1 stop32h 45m

£626

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 30/9

18:00-11:20

2 stops35h 20m

London Gatwick

Wed 7/10

16:25-12:40

1 stop26h 15m

£633

Flights are sorted by cheapest return flights first.

Deals found on 27/7

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

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 £477). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of £1,034). 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 28 July 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 28 July 2026.

The most flights from ORD to LON are scheduled on a Monday (57 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (49 on average).

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

Airfare is typical for this route at the moment.
Chicago O'Hare Intl Airport to London flights typically cost between £491 and £717 in August.
The cheapest return price found within the last 5 days was £522 on Multiple Airlines (23 Aug–9 Sept).

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 63% 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 £370.

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 Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 10h 23m.

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 58m.

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, British Airways have had the lowest number of delays on this route, with just 24% of flights being delayed.

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 47 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 28 July 2026.
Get a feel of what it's like to fly with United Airlines,Iberia, andBritish 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
10,049 reviews
Check prices

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
United Airlines
7.4
Good
10,049 reviews
United Airlines
7.4
Good
10,049 reviews
Check prices

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Iberia
7.0
Good
3,258 reviews
United Airlines
7.4
Good
10,049 reviews
Check prices

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
British Airways
6.7
Okay
8,129 reviews
United Airlines
7.4
Good
10,049 reviews
Check prices

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!

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 £612, Scandinavian Airlines can have you in London from Chicago O'Hare Intl Airport in 18h 15m. Chicago O'Hare Intl Airport and London are separated by a distance of 3939 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, Icelandair (£367), American Airlines (£389), and British Airways (£416) offers the cheapest pricing from Chicago O'Hare Intl Airport to London. Users have found that Icelandair is 40% 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 £166. 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 SriLankan Airlines (67%), Air Canada (67%) or Austrian Airlines (67%) 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 £646, our data indicates the cheapest price to be £278. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £495.

  • 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 £477). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of £1,034). 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

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Top 7 airlines flying from O'Hare Intl to London

Discover the top 7 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 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£367Average£559FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
American AirlinesCheapest£389Average£830FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£416Average£614FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£463Average£813FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£512Average£817FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£523Average£692FlexibilityNo cancel feeOn-time77%
Search Iberia flights
JetBlueCheapest£791Average£889FlexibilityNo cancel feeOn-time62%
Search JetBlue flights

Fly with Cheapflights

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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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