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O'Hare Intl

$529+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from London to Chicago O'Hare Intl are usually found in February or March, booked 83 days in advance, depart on a Friday or Tuesday and return on a Wednesday

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 July 3, 2025.

Round-trip from

$556
(Gotogate)

One-way from

$529
(Mytrip)

Popular in

August

Cheapest in

February

Average price

$913

Good round-trip deal

$673 or less

Good one-way deal

$637 or less
From London (LON) to Chicago O'Hare Intl
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One-way flight from London (LON) to Chicago O'Hare Intl
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Highest demand for flights based on searches. 11% potential increase in price ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from London (LON) to Chicago O'Hare Intl.
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Price to beat on a one-way flight from London (LON) to Chicago O'Hare Intl.
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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 July 3, 2025.

This Gotogate deal was found by Cheapflights users on 7/1. 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.
Wed 8/206:45 pmLHR - ORD
1 stop23h 50mTAP AIR PORTUGAL
Mon 8/256:10 pmORD - LHR
1 stop21h 50mTAP AIR PORTUGAL
Deal found 7/1$556
This Norse deal was found by Cheapflights users on 7/3. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/232:00 pmLGW - ORD
1 stop32h 10mMultiple Airlines
Mon 9/85:17 pmORD - LGW
1 stop34h 43mMultiple Airlines
Deal found 7/3$557
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2110:35 amLGW - ORD
1 stop35h 35mTAP AIR PORTUGAL
Sat 9/136:15 pmORD - LGW
1 stop33h 30mTAP AIR PORTUGAL
Deal found 7/2$558
This TravelUp deal was found by Cheapflights users on 7/2. 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.
Mon 8/256:00 amLHR - ORD
1 stop12h 10mMultiple Airlines
Fri 9/199:25 pmORD - LHR
Nonstop8h 20mMultiple Airlines
Deal found 7/2$558
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1511:55 amLGW - ORD
1 stop11h 25mIcelandair
Sat 1/106:30 pmORD - LGW
1 stop10h 25mIcelandair
Deal found 7/1$560
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 11/2410:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Sat 11/297:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 7/2$564
This Cheapflightsfares deal was found by Cheapflights users on 7/2. 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.
Wed 9/179:50 amLHR - ORD
1 stop11h 55mBritish Airways
Sun 9/219:15 pmORD - LHR
Nonstop7h 50mBritish Airways
Deal found 7/2$565
This ChecknFly deal was found by Cheapflights users on 7/2. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/97:30 amLHR - ORD
1 stop13h 25mLufthansa
Mon 10/135:01 amORD - LHR
1 stop22h 39mLufthansa
Deal found 7/2$567
This United Airlines deal was found by Cheapflights users on 7/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/108:40 amLHR - ORD
1 stop13h 15mUnited Airlines
Wed 9/1710:35 amORD - LHR
1 stop13h 20mUnited Airlines
Deal found 7/2$574
This Austrian Airlines deal was found by Cheapflights users on 7/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:00 amLHR - ORD
1 stop13h 20mAustrian Airlines
Tue 10/146:00 pmORD - LHR
Nonstop8h 20mAustrian Airlines
Deal found 7/1$575
This SWISS deal was found by Cheapflights users on 7/3. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/248:05 pmLHR - ORD
1 stop22h 05mSWISS
Tue 9/97:05 pmORD - LHR
1 stop15h 20mSWISS
Deal found 7/3$577
This Air Canada deal was found by Cheapflights users on 7/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:50 amLHR - ORD
2 stops14h 05mAir Canada
Sun 9/212:08 pmORD - LHR
1 stop10h 22mAir Canada
Deal found 7/1$588

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 July 3, 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

Wed 8/20

6:45 pm-12:35 pm

1 stop23h 50m

Chicago O'Hare Intl

Mon 8/25

6:10 pm-10:00 pm

1 stop21h 50m

$556

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 8/23

2:00 pm-4:10 pm

1 stop32h 10m

Chicago O'Hare Intl

Mon 9/8

5:17 pm-10:00 am

1 stop34h 43m

$557

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 8/21

10:35 am-4:10 pm

1 stop35h 35m

Chicago O'Hare Intl

Sat 9/13

6:15 pm-9:45 am

1 stop33h 30m

$558

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 8/25

6:00 am-12:10 pm

1 stop12h 10m

Chicago O'Hare Intl

Fri 9/19

9:25 pm-11:45 am

Nonstop8h 20m

$558

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 11/15

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Sat 1/10

6:30 pm-10:55 am

1 stop10h 25m

$560

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 11/24

10:20 am-4:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Sat 11/29

7:20 pm-4:00 pm

1 stop14h 40m

$564

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/17

9:50 am-3:45 pm

1 stop11h 55m

Chicago O'Hare Intl

Sun 9/21

9:15 pm-11:05 am

Nonstop7h 50m

$565

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

7:30 am-2:55 pm

1 stop13h 25m

Chicago O'Hare Intl

Mon 10/13

5:01 am-9:40 am

1 stop22h 39m

$567

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/10

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Wed 9/17

10:35 am-5:55 am

1 stop13h 20m

$574

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/7

6:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Tue 10/14

6:00 pm-8:20 am

Nonstop8h 20m

$575

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 41 results
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The best insider tips for London to Chicago O'Hare Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London to Chicago O'Hare Intl Airport trip
Airlines
British Airways

BA's Club Suite business class offers private pods with doors, available on most 777s and A350s.


BA's World Traveller Plus offers extra seat width, legroom, and upgraded service in a dedicated cabin.

Read more about British Airwaysby Gabriel Leigh
United Airlines

United's Polaris Business Class features lie-flat seats, Saks bedding, and access to Polaris Lounges.


United's Premium Plus offers extra legroom, upgraded meals, and two checked bags on international flights.

Read more about United Airlinesby Harriet Baskas
Iberia

Iberia's premium economy offers 37-inch legroom, noise-canceling headphones, and priority boarding.


Iberia offers two hot meal options on long-haul flights, with special meals available on request.

Read more about Iberiaby Emily Zemler
Airports
LHR

Expect long security lines at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screenings.

Read more about LHRby Ramsey Qubein
ORD

At ORD, immigration lines can be long. Consider using Mobile Passport for expedited service, though it may not always be available.

Read more about ORDby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

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 Baskas

Harriet Baskas

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
Emily Zemler

Emily Zemler

Expert on Iberia

Emily Zemler

Emily Zemler

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
Ramsey Qubein

Ramsey Qubein

Expert on ORD and LHR

Ramsey Qubein

Ramsey Qubein

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

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 June 27, 2025.

The best time to book flights from London to Chicago O'Hare Intl Airport is 83 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, August is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of $245). Flying from London to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 July 3, 2025.

When flying from London to Chicago O'Hare Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 28% versus a flight in the afternoon.

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 round-trip from London to O'Hare Intl. Price data was last updated on September 1, 2024.

Travelers seeking maximum savings on their London to Chicago O'Hare Intl Airport flight should consider departing on Sunday evenings when fares are most often at their lowest. Wednesday 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 July 3, 2025.

The most flights from LON to ORD are scheduled on a Wednesday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).

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 July 3, 2025.
Peruse reviews from past customers who have flown with KLM, Austrian Airlines, and Air France 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.
KLM
7.8
Good
1,367 reviews

Comfort

7.7

Food

7.2

Overall

7.8

Crew

8.4

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,367 reviews
KLM
7.8
Good
1,367 reviews

Comfort

7.7

Food

7.2

Overall

7.8

Crew

8.4

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
809 reviews
KLM
7.8
Good
1,367 reviews

Comfort

7.7

Food

7.2

Overall

7.8

Crew

8.4

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air France
7.5
Good
1,465 reviews
KLM
7.8
Good
1,367 reviews

Comfort

7.7

Food

7.2

Overall

7.8

Crew

8.4

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,654 reviews
KLM
7.8
Good
1,367 reviews

Comfort

7.7

Food

7.2

Overall

7.8

Crew

8.4

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,861 reviews
KLM
7.8
Good
1,367 reviews

Comfort

7.7

Food

7.2

Overall

7.8

Crew

8.4

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

  • 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 $556. Other airlines that can offer you cheap pricing are Icelandair, from $560, and Scandinavian Airlines, from $564. Users have found that TAP AIR PORTUGAL is 24% 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 $534 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from $534 and JetBlue from $535 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: Air Canada (89%), Austrian Airlines (89%), United Airlines (89%).

  • 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 $530. On average you can expect to pay $2,462. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $502.

  • 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, August is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of $245). Flying from London to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$390Average$564FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$569FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$789FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$485Average$745FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$551Average$768FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$568Average$725FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$788FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$582Average$792FlexibilityNo cancel feeOn-time71%
Austrian AirlinesCheapest$586Average$987FlexibilityNo cancel feeOn-time78%
FinnairCheapest$607Average$838FlexibilityNo cancel feeOn-time76%

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