Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Chicago O'Hare Intl Airport from £414

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.
LON — ORD
24 Aug — 31 Aug1
1 adult

Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in February or September, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap 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 19 August 2025.

Round-trip from

£422

One-way from

£414

Popular in

July

Cheapest in

February

Average price

£635

Good round-trip deal

£494 or less

Good one-way deal

£570 or less
15/9-19/9
  • 15/9-19/9
  • 2 total stops
  • 27h 00m total
  • London to Chicago
Search Deals
27/9
  • 27/9
  • 3 total stops
  • 42h 03m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 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 August 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

Find flight deals from London to O'Hare Intl

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 19 August 2025.

Mon 25/810:40LGW - ORD
1 stop15h 04mBritish Airways
Tue 30/913:59ORD - LGW
1 stop12h 11mBritish Airways
Deal found 18/8£422
Fri 19/907:40LHR - ORD
1 stop14h 05mAmerican Airlines
Sun 14/1221:45ORD - LHR
Nonstop7h 50mAmerican Airlines
Deal found 19/8£422
Sun 24/806:30LHR - ORD
1 stop14h 25mUnited Airlines
Tue 30/918:00ORD - LHR
Nonstop8h 20mUnited Airlines
Deal found 17/8£423
Fri 31/1013:00LGW - ORD
1 stop28h 45mMultiple Airlines
Fri 7/1106:40ORD - LGW
1 stop17h 20mMultiple Airlines
Deal found 18/8£423
Wed 27/808:40LHR - ORD
1 stop13h 15mUnited Airlines
Thu 2/1009:55ORD - LHR
1 stop18h 05mUnited Airlines
Deal found 18/8£423
Sat 30/814:00LGW - ORD
1 stop14h 22mMultiple Airlines
Sun 28/905:10ORD - LGW
2 stops19h 10mMultiple Airlines
Deal found 18/8£424
Sat 20/909:20LCY - ORD
1 stop12h 35mSWISS
Mon 22/919:05ORD - LCY
1 stop11h 25mSWISS
Deal found 18/8£424
Wed 27/806:50LHR - ORD
1 stop11h 05mUnited Airlines
Wed 10/921:50ORD - LHR
Nonstop7h 55mUnited Airlines
Deal found 18/8£424
Thu 28/808:45LTN - ORD
2 stops18h 30mMultiple Airlines
Thu 4/919:25ORD - LTN
2 stops15h 10mMultiple Airlines
Deal found 17/8£424
Thu 28/809:45LGW - ORD
2 stops17h 30mMultiple Airlines
Thu 4/919:25ORD - LGW
2 stops18h 55mMultiple Airlines
Deal found 17/8£425
Wed 8/1008:40LHR - ORD
1 stop13h 15mUnited Airlines
Wed 15/1014:39ORD - LHR
1 stop10h 16mUnited Airlines
Deal found 19/8£425
Thu 18/921:45LGW - ORD
2 stops24h 45mMultiple Airlines
Wed 1/1011:13ORD - LGW
1 stop13h 07mMultiple Airlines
Deal found 19/8£426

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 19 August 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

LGW - ORD

LGWORD

London Gatwick

Mon 15/9

08:40-19:00

1 stop16h 20m

Chicago O'Hare Intl

Fri 19/9

15:45-08:25

1 stop10h 40m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

Thu 18/9

06:00-07:40

1 stop19h 40m

£422

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 18/9

21:45-16:30

2 stops24h 45m

Chicago O'Hare Intl

Tue 30/9

11:13-06:20

1 stop13h 07m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 8/9

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

Thu 18/9

21:50-11:45

Nonstop7h 55m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 26/9

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

Sat 4/10

10:50-08:35

1 stop15h 45m

£422

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 23/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

Sun 5/10

16:00-06:20

Nonstop8h 20m

£422

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 8/10

14:00-08:14

1 stop24h 14m

Chicago O'Hare Intl

Sun 12/10

06:00-10:10

1 stop22h 10m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

Mon 15/9

16:00-06:20

Nonstop8h 20m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/9

08:30-14:55

1 stop12h 25m

Chicago O'Hare Intl

Mon 29/9

18:00-08:20

Nonstop8h 20m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 15/9

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

Sun 28/9

16:00-06:20

Nonstop8h 20m

£423

Flights are sorted by cheapest return flights first.

Deals found on 19/8

Showing 1-10 of 60 results
1
2
3
...
6

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 8 August 2025.

The best time to book flights from London to Chicago O'Hare Intl Airport is 70 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, January is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £595). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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 19 August 2025.

It’s typically best to fly out from London to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 15% 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 Monday evenings when fares are most often at their lowest. Sunday 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 19 August 2025.

The most flights from LON to ORD are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (46 on average).

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

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 39% 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.

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £343.

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 50m.

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 0h 55m.

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 19 August 2025.
Get a feel of what it's like to fly with Finnair, Aer Lingus, 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
1,320 reviews
Check prices

Overall

7.6

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,320 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Overall

7.6

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Aer Lingus
7.2
Good
1,221 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Overall

7.6

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.0
Good
529 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Overall

7.6

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,334 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Overall

7.6

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,283 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Overall

7.6

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 and SWISS can get you from London to Chicago O'Hare Intl Airport in just under 12h 25m. Your travel time can differ by up to 10m. There are 3939 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 £310. Additional return tickets that might be worth considering are offered by Scandinavian Airlines and TAP AIR PORTUGAL, with the lowest prices starting at £351 and £365, respectively. You may be able to fly from London to Chicago O'Hare Intl Airport for 42% less than the average price by searching for these airlines.

  • 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 Air Canada (73%), Austrian Airlines (73%) or United Airlines (73%) 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 £414. On average you can expect to pay £1,478. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for £347.

  • 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, January is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of £595). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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
Rosemont

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 19 August 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 19 August 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£310Average£488FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£351Average£477FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£365Average£609FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£379Average£489FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£385Average£570FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Brussels AirlinesCheapest£391Average£569FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£395Average£575FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£401Average£578FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£405Average£565FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£406Average£555FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.