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Cheap flights from Chicago O'Hare Intl Airport to London from £257

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
8 Jul — 15 Jul1
1 adult

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in April or February, booked 82 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 3 July 2025.

Round-trip from

£479

One-way from

£257

Popular in

June

Cheapest in

April

Average price

£752

Good round-trip deal

£573 or less

Good one-way deal

£315 or less
American Airlines
  • American Airlines
  • 26/7-11/8
  • 1 total stop
  • 21h 20m total
  • Chicago to London
5/8
  • 5/8
  • 3 total stops
  • 32h 01m total
  • Chicago to London
Highest demand for flights based on searches. 20% potential increase in price (£107 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).
Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).

Find flight deals from O'Hare Intl to London

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 3 July 2025.

Sat 26/721:15ORD - LHR
Nonstop7h 50mAmerican Airlines
Mon 11/808:15LHR - ORD
1 stop13h 30mAmerican Airlines
Deal found 3/7£479
Thu 11/918:00ORD - LGW
2 stops20h 25mTAP AIR PORTUGAL
Wed 8/1016:25LGW - ORD
1 stop26h 10mTAP AIR PORTUGAL
Deal found 1/7£479
Tue 5/820:15ORD - LHR
Nonstop8h 05mBritish Airways
Wed 13/815:30LHR - ORD
Nonstop8h 45mBritish Airways
Deal found 2/7£480
Fri 15/820:47ORD - LGW
2 stops32h 08mMultiple Airlines
Fri 22/810:55LGW - ORD
1 stop24h 45mMultiple Airlines
Deal found 1/7£480
Tue 25/1107:00ORD - LHR
2 stops20h 20mScandinavian Airlines
Tue 2/1219:30LHR - ORD
1 stop27h 15mScandinavian Airlines
Deal found 2/7£480
Thu 14/821:15ORD - STN
1 stop12h 30mMultiple Airlines
Fri 22/811:15STN - ORD
1 stop13h 45mMultiple Airlines
Deal found 2/7£480
Tue 25/1117:50ORD - LHR
Nonstop8h 05mUnited Airlines
Tue 2/1208:55LHR - ORD
1 stop13h 20mUnited Airlines
Deal found 1/7£481
Thu 7/821:15ORD - LHR
1 stop10h 10mAer Lingus
Thu 28/808:50LHR - ORD
1 stop11h 10mAer Lingus
Deal found 2/7£482
Thu 11/919:25ORD - LTN
2 stops16h 10mMultiple Airlines
Fri 19/906:05LTN - ORD
2 stops18h 10mMultiple Airlines
Deal found 2/7£482
Wed 30/719:25ORD - LHR
1 stop10h 30mIcelandair
Thu 14/813:05LHR - ORD
1 stop11h 10mIcelandair
Deal found 1/7£483
Sat 4/1013:59ORD - LHR
1 stop25h 41mIberia
Tue 21/1012:15LHR - ORD
Nonstop8h 35mIberia
Deal found 1/7£484
Thu 11/922:15ORD - LGW
1 stop10h 25mIcelandair
Wed 8/1015:40LGW - ORD
1 stop11h 35mIcelandair
Deal found 30/6£484

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 3 July 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

O'Hare Intl

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 26/7

21:15-11:05

Nonstop7h 50m

London Heathrow

Mon 11/8

08:15-15:45

1 stop13h 30m

£479

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Thu 11/9

18:00-20:25

2 stops20h 25m

London Gatwick

Wed 8/10

16:25-12:35

1 stop26h 10m

£479

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/8

20:15-10:20

Nonstop8h 05m

London Heathrow

Wed 13/8

15:30-18:15

Nonstop8h 45m

£480

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 15/8

20:47-10:55

2 stops32h 08m

London Gatwick

Fri 22/8

10:55-05:40

1 stop24h 45m

£480

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 25/11

07:00-09:20

2 stops20h 20m

London Heathrow

Tue 2/12

19:30-16:45

1 stop27h 15m

£480

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Thu 14/8

21:15-15:45

1 stop12h 30m

London Stansted

Fri 22/8

11:15-19:00

1 stop13h 45m

£480

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 25/11

17:50-07:55

Nonstop8h 05m

London Heathrow

Tue 2/12

08:55-16:15

1 stop13h 20m

£481

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 7/8

21:15-13:25

1 stop10h 10m

London Heathrow

Thu 28/8

08:50-14:00

1 stop11h 10m

£482

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Thu 11/9

19:25-17:35

2 stops16h 10m

London Luton

Fri 19/9

06:05-18:15

2 stops18h 10m

£482

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 30/7

19:25-11:55

1 stop10h 30m

London Heathrow

Thu 14/8

13:05-18:15

1 stop11h 10m

£483

Flights are sorted by cheapest return flights first.

Deals found on 2/7

Showing 1-10 of 52 results
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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?

Use this chart to determine the optimal time to book a return flight from O'Hare Intl to London. Price data was last updated on 27 June 2025.

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 82 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 £112). Flying from Chicago O'Hare Intl Airport to London in August is currently the most expensive (average of £164). 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 3 July 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to London in the afternoon. Doing so could potentially save you 13% on the flight price compared to flying at midday, which is usually more expensive.

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 3 July 2025.

The most flights from ORD to LON are scheduled on a Monday (51 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (31 on average).

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 3 July 2025.
Get a feel of what it's like to fly with Delta, Austrian Airlines, andSWISS 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.

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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

    According to our current data, American Airlines (£479), TAP AIR PORTUGAL (£479), and British Airways (£480) offers the cheapest pricing from Chicago O'Hare Intl Airport to London. Users have found that American Airlines is 16% 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 Scandinavian Airlines, with whom users have recently found tickets for as low as £257. However, be on the lookout for offers from JetBlue and TAP AIR PORTUGAL, 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?

  • 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 Royal Jordanian (70%), 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 £1,858, our data indicates the cheapest price to be £284. The most popular route (Chicago O'Hare Intl - London Heathrow), is priced around £241.

  • 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 £112). Flying from Chicago O'Hare Intl Airport to London in August is currently the most expensive (average of £164). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Gatwick
Luton
Slough
Wembley
Crawley
Eastbourne
Ilford
Hayes
Folkestone
Southend-on-Sea
Watford
Ipswich
Winchester
Maidstone
Guildford
Chichester

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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 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£404Average£569FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£406Average£591FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£438Average£568FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£454Average£689FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£456Average£639FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£476Average£792FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£504Average£747FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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

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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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