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Cheap flights from London to Chicago O'Hare Intl Airport from £404

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 26/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in February or September, booked 61 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from London to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from London to O'Hare Intl
Explore the most affordable flight options available from London to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Tue 23/1220:35LHR - ORD
1 stop26h 45mIcelandair
Thu 15/118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 3/12£469
Fri 5/1212:20LHR - ORD
1 stop15h 32mJetBlue
Mon 12/106:45ORD - LHR
1 stop18h 10mJetBlue
Deal found 3/12£475
Fri 12/1206:40LHR - ORD
2 stops21h 07mScandinavian Airlines
Thu 15/119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 3/12£480
Fri 12/1212:15LHR - ORD
1 stop11h 05mIcelandair
Thu 15/118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 3/12£484
Mon 15/1220:35LHR - ORD
1 stop26h 45mIcelandair
Fri 16/118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 3/12£487
Mon 8/1220:35LHR - ORD
1 stop26h 45mIcelandair
Sun 14/1218:30ORD - LHR
1 stop10h 20mIcelandair
Deal found 4/12£489
Sun 14/1210:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Thu 5/219:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 3/12£489
Fri 12/1219:50LHR - ORD
2 stops50h 55mScandinavian Airlines
Fri 16/119:20ORD - LHR
1 stop32h 00mScandinavian Airlines
Deal found 4/12£493
Tue 23/1219:50LHR - ORD
2 stops26h 55mScandinavian Airlines
Thu 15/119:20ORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 3/12£498
Mon 15/1221:25LGW - ORD
2 stops47h 35mTAP AIR PORTUGAL
Fri 16/120:15ORD - LGW
1 stop13h 30mTAP AIR PORTUGAL
Deal found 3/12£504
Fri 5/1216:00LGW - ORD
2 stops52h 45mMultiple Airlines
Mon 12/108:35ORD - LGW
1 stop15h 25mMultiple Airlines
Deal found 3/12£504
Mon 29/1211:55LGW - ORD
1 stop11h 25mIcelandair
Wed 25/319:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 3/12£507

Find flight deals from London to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to O'Hare Intl (ORD). 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 5 December 2025.

Round-trip from

£468

One-way from

£404

Popular in

July

Cheapest in

February

Average price

£632

Good round-trip deal

£546 or less

Good one-way deal

£469 or less
United Airlines
  • United Airlines
  • 17/1-24/1
  • 2 total stops
  • 28h 15m total
  • London to Chicago
Search Deals
26/3
  • 26/3
  • 3 total stops
  • 38h 10m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£54 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from London (LON) to Chicago O'Hare Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to O'Hare Intl 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 5 December 2025.
Use the filters below to find and compare flights from London to Chicago O'Hare Intl Airport that are best for you.

Fly from

London

Fly to

O'Hare Intl

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 17/1

06:30-15:20

1 stop14h 50m

Chicago O'Hare Intl

Sat 24/1

17:50-07:55

Nonstop8h 05m

£468

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 22/1

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Mon 26/1

18:30-10:55

1 stop10h 25m

£470

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 19/3

07:05-17:45

2 stops15h 40m

Chicago O'Hare Intl

Tue 24/3

10:40-09:20

2 stops17h 40m

£470

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 12/1

13:55-15:10

2 stops31h 15m

Chicago O'Hare Intl

Sun 18/1

10:29-13:30

3 stops21h 01m

£471

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 19/3

06:30-18:20

2 stops16h 50m

Chicago O'Hare Intl

Tue 24/3

19:30-18:20

2 stops17h 50m

£483

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 24/5

06:30-12:55

1 stop12h 25m

Chicago O'Hare Intl

Fri 5/6

08:40-10:00

1 stop19h 20m

£483

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 30/4

13:00-18:15

1 stop11h 15m

Chicago O'Hare Intl

Thu 14/5

19:25-14:40

1 stop13h 15m

£487

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 29/4

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Wed 13/5

22:40-14:40

1 stop10h 00m

£488

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 29/4

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Mon 11/5

19:25-11:45

1 stop10h 20m

£488

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

06:00-14:00

1 stop14h 00m

Chicago O'Hare Intl

Tue 10/3

22:05-11:15

Nonstop8h 10m

£489

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 60 results
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Best time to book a flight from London to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from London 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 London to Chicago O'Hare Intl Airport

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

Use this chart to determine the optimal time to book a return flight from London to O'Hare Intl. Price data was last updated on 28 November 2025.

The best time to book flights from London to Chicago O'Hare Intl Airport is 61 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, March is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £303). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £504). 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 LON to ORD?

Find hourly flight availability from London to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 December 2025.

It’s typically best to fly out from London to Chicago O'Hare Intl Airport in the morning. Doing so could potentially save you 7% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from London to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly return from London to O'Hare Intl. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Chicago O'Hare Intl Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from London to O'Hare Intl. 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 5 December 2025.

The most flights from LON to ORD are scheduled on a Thursday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (30 on average).

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 44% of one-stop itineraries from London to Chicago O'Hare Intl Airport on Cheapflights.

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

Average return fare for one-stop flights from London to Chicago O'Hare Intl Airport, 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 £364.

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

Shortest average travel time for one-stop one-way flights from London to Chicago O'Hare Intl Airport, 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: 10h 57m.

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

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

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 20m.

How often are flights from London to Chicago delayed?

About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 168 minutes.

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

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

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

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

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

Over the past year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 5 December 2025.
Get a feel of what it's like to fly with Finnair, United Airlines, andIcelandair from London to Chicago O'Hare Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,334 reviews
Check prices

Boarding

7.6

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Boarding

7.6

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
United Airlines
7.4
Good
9,065 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Boarding

7.6

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Icelandair
7.0
Good
584 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Boarding

7.6

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Lufthansa
6.8
Okay
7,613 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Boarding

7.6

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
British Airways
6.7
Okay
7,562 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Boarding

7.6

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Related info for your journey

Find useful and relevant information for your journey from London to O'Hare Intl. 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 London to Chicago O'Hare Intl Airport?

    United Airlines, Icelandair, and Scandinavian Airlines can get you from London to Chicago O'Hare Intl Airport in just under 11h 25m. Your travel time can differ by up to 4h 15m. There are 3960 mi between London and Chicago O'Hare Intl Airport. This flight may include one or multiple stops.

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

    Flying on Icelandair is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at £316. Additional return tickets that might be worth considering are offered by Virgin Atlantic and Scandinavian Airlines, with the lowest prices starting at £347 and £362, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 41% less than the average price by searching for these airlines.

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

    For one-way options, check prices for Scandinavian Airlines. According to our data, you can fly for as low as £265. Users have also found prices from £287 and £312 on Icelandair and JetBlue, respectively.

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

    When deciding which route to take from London to Chicago O'Hare Intl Airport consider London Heathrow - Chicago O'Hare Intl, London Gatwick - Chicago O'Hare Intl or London City - Chicago O'Hare Intl as they are the most popular.

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

    Consider Austrian Airlines (88%), Brussels Airlines (88%) or Lufthansa (88%) when booking your flight. These represent the most reliable airlines when flying from London to Chicago O'Hare Intl Airport.

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

    The cheapest flight price from London to Chicago O'Hare Intl Airport is £370. On average you can expect to pay £1,302. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £366.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to O'Hare Intl 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 London to Chicago O'Hare Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £303). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £504). 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
Downers Grove
Elk Grove Village

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Fly from London to O'Hare Intl on these airlines

Choose from the following airlines for your flight from London to O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on 5 December 2025.
British Airways flights from London to Chicago O'Hare Intl
Lufthansa flights from London to Chicago O'Hare Intl
Finnair flights from London to Chicago O'Hare Intl

Top 10 airlines flying from London to O'Hare Intl

Discover the top 10 airlines that operate flights from London to O'Hare Intl. 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£316Average£490FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£347Average£533FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£362Average£482FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£367Average£623FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£371Average£609FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£388Average£547FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£398Average£578FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£406Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£407Average£610FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£412Average£553FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 London to O'Hare Intl?

Cheapflights helps you search for flights from London to O'Hare Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to O'Hare Intl for you. Better yet — we are completely free to use.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to O'Hare Intl flexibly with Cheapflights today.

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

Yes! Start tracking prices for London to O'Hare Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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