HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$474+ Cheap flights from London (LON) to O'Hare Intl (ORD)

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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to O'Hare Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in September or February, booked 35 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap 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 January 20, 2026.

This Gotogate deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/173:40 pm
LGW
-
ORD
1 stop32h 35m
Icelandair
Wed 9/3010:25 pm
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 1/20$533
This TravelUp deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/191:25 pm
LHR
-
ORD
1 stop11h 50m
British Airways
Sun 5/179:00 pm
ORD
-
LHR
1 stop10h 30m
British Airways
Deal found 1/20$533
This British Airways deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/287:50 am
LHR
-
ORD
2 stops18h 14m
British Airways
Mon 2/29:00 pm
ORD
-
LHR
1 stop16h 50m
British Airways
Deal found 1/20$534
This Ovago deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/244:35 pm
LGW
-
ORD
1 stop28h 10m
TAP AIR PORTUGAL
Fri 2/68:15 pm
ORD
-
LGW
1 stop13h 30m
TAP AIR PORTUGAL
Deal found 1/20$535
This Cheapflightsfares deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/512:10 pm
LHR
-
ORD
1 stop13h 05m
British Airways
Thu 2/128:35 pm
ORD
-
LHR
Nonstop7h 50m
British Airways
Deal found 1/18$535
This oojo deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/76:40 am
LHR
-
ORD
2 stops16h 05m
Scandinavian Airlines
Sun 2/227:10 pm
ORD
-
LHR
2 stops15h 15m
Scandinavian Airlines
Deal found 1/18$536
This Kiwi.com deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Wed 3/187:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 1/18$537
This British Airways deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/712:50 pm
LHR
-
ORD
1 stop12h 25m
British Airways
Wed 2/186:30 pm
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 1/20$537
This Kiwi.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Wed 3/187:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 1/19$538
This British Airways deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/712:50 pm
LHR
-
ORD
1 stop12h 25m
British Airways
Sat 2/146:30 pm
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 1/20$538
This Icelandair deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/211:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Mon 3/97:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 1/19$539
This Kiwi.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/412:15 pm
LHR
-
ORD
1 stop11h 05m
Icelandair
Tue 3/107:30 pm
ORD
-
LHR
1 stop10h 20m
Icelandair
Deal found 1/19$539

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 January 20, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$533
(TravelUp)

One-way from

$474
(Icelandair)

Popular in

July

Cheapest in

September

Average price

$724

Good round-trip deal

$674 or less

Good one-way deal

$654 or less
Provider with most accurate pricing for London (LON)-Chicago O'Hare Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Chicago O'Hare Intl flights.
Search Deals
From London (LON) to Chicago O'Hare Intl
Search Deals
One-way flight from London (LON) to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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

 
Customize 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 2,558,603 searches. Data last updated January 20, 2026.
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

Mon 3/2

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Sun 3/8

7:40 pm-8:35 am

Nonstop7h 55m

$538

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 3/2

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Tue 3/10

7:40 pm-8:35 am

Nonstop7h 55m

$538

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 2/11

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Wed 3/4

6:30 pm-10:55 am

1 stop10h 25m

$548

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/23

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 4/27

9:20 pm-11:45 am

Nonstop8h 25m

$554

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 4/12

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Thu 4/30

8:35 pm-10:30 am

Nonstop7h 55m

$555

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 2/18

9:00 am-4:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Wed 3/11

10:05 pm-11:15 am

Nonstop8h 10m

$560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 3/5

9:00 am-4:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Thu 3/12

6:00 am-9:20 pm

1 stop10h 20m

$560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 2/7

6:40 am-4:45 pm

2 stops16h 05m

Chicago O'Hare Intl

Wed 2/18

7:20 pm-4:00 pm

1 stop14h 40m

$561

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/11

6:30 am-3:00 pm

1 stop13h 30m

Chicago O'Hare Intl

Sat 3/14

7:58 pm-7:50 am

1 stop30h 52m

$563

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 2/5

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 3/3

6:30 pm-10:55 am

1 stop10h 25m

$573

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/17

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

Compare providers for flights from London to O'Hare Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to O'Hare Intl in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Chicago O'Hare Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Chicago O'Hare Intl Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 round-trip flight from London to O'Hare Intl. Price data was last updated on January 16, 2026.

The best time to book flights from London to Chicago O'Hare Intl Airport is 35 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, December is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of $293). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $673). 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 January 20, 2026.

When flying from London to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 January 20, 2026.

The most flights from LON to ORD are scheduled on a Tuesday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 on average).

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

The best insider tips for London to Chicago O'Hare Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London to Chicago O'Hare Intl Airport trip
Our travel experts
Emily Zemler

Emily Zemler

Expert on Iberia

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD and LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 January 20, 2026.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Icelandair from London to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,186 reviews

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,186 reviews
United Airlines
7.4
Good
9,186 reviews

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
American Airlines
7.2
Good
11,167 reviews
United Airlines
7.4
Good
9,186 reviews

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Icelandair
7.1
Good
602 reviews
United Airlines
7.4
Good
9,186 reviews

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Lufthansa
6.8
Okay
7,734 reviews
United Airlines
7.4
Good
9,186 reviews

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
British Airways
6.7
Okay
7,690 reviews
United Airlines
7.4
Good
9,186 reviews

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

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?

    British Airways, Icelandair, and United Airlines can get you from London to Chicago O'Hare Intl Airport in just under 11h 10m. Your travel time can differ by up to 2h 05m. The distance from London to Chicago O'Hare Intl Airport is about 3939 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from London to Chicago O'Hare Intl Airport round-trip from $446. Other airlines that can offer you cheap pricing are Icelandair, from $453, and United Airlines, from $485. Users have found that Aer Lingus is 37% cheaper than the other options available to this destination.

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

    One-way options have recently been found by users for as low as $288 on Scandinavian Airlines. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $393 and Aer Lingus from $475 one-way.

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

    While some choose either London Gatwick - Chicago O'Hare Intl or London City - Chicago O'Hare Intl, London Heathrow - Chicago O'Hare Intl is the most popular route from London to Chicago O'Hare Intl Airport.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Chicago O'Hare Intl Airport on time: SWISS (88%), Austrian Airlines (87%), Air Canada (87%).

  • 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 $502. On average you can expect to pay $1,492. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $367.

  • 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 vacation 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, December is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of $293). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $673). 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

Traveling 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
Schaumburg
Rosemont
Naperville
Gurnee
Elgin
Hoffman Estates
Beloit
Delavan
Oak Brook
Downers Grove
Des Plaines
Elk Grove Village
Skokie
Libertyville
Lake Geneva
Bridgeview
Kenosha
Warrenville
Waukegan
Aurora

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.

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 2,558,603 searches. Data last updated January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$672FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$453Average$565FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$485Average$647FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$550Average$771FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$558Average$778FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$572Average$776FlexibilityNo cancel feeOn-time71%
FinnairCheapest$576Average$733FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$720Average$838FlexibilityNo cancel feeOn-time76%

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.