London

$230+ Cheap flights from O'Hare Intl (ORD) to London (LON)

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Oct 11 — Oct 181
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in February or April, booked 17 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from O'Hare Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$505
(United Airlines)

One-way from

$230
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$670

Good round-trip deal

$639 or less

Good one-way deal

$434 or less
From Chicago O'Hare Intl to London (LON)
One-way flight from Chicago O'Hare Intl to London (LON)
Highest demand for flights based on searches. 20% potential increase in price ($201 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).
Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).

Find flight deals from O'Hare Intl to London

Cheapest flights from O'Hare Intl to London
Explore the most affordable flight options available from O'Hare Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 9/284:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
Wed 10/156:50 amLHR - ORD
1 stop11h 15mUnited Airlines
Deal found 9/8$505
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:50 pmORD - LGW
1 stop17h 00mSWISS
Mon 11/36:40 pmLGW - ORD
1 stop27h 40mSWISS
Deal found 9/11$505
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/249:50 pmORD - LHR
Nonstop7h 55mUnited Airlines
Wed 10/226:50 amLHR - ORD
1 stop11h 15mUnited Airlines
Deal found 9/9$506
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 11/106:30 pmORD - LTN
1 stop13h 30mMultiple Airlines
Sun 11/236:00 amLTN - ORD
1 stop17h 20mMultiple Airlines
Deal found 9/10$506
This Air Canada deal was found by Cheapflights users on 9/11. 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 11/1212:50 pmORD - LHR
1 stop12h 20mAir Canada
Fri 11/216:50 amLHR - ORD
2 stops14h 05mAir Canada
Deal found 9/11$507
This Tripair deal was found by Cheapflights users on 9/9. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2111:40 amORD - LHR
1 stop13h 15mUnited Airlines
Tue 9/3011:05 amLHR - ORD
Nonstop9h 05mUnited Airlines
Deal found 9/9$508
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 12/36:40 amORD - LGW
1 stop17h 20mMultiple Airlines
Tue 12/91:00 pmLGW - ORD
1 stop29h 45mMultiple Airlines
Deal found 9/10$508
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/228:40 amORD - STN
2 stops26h 15mMultiple Airlines
Wed 10/298:55 pmSTN - ORD
2 stops25h 25mMultiple Airlines
Deal found 9/9$508
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 9/189:05 pmORD - LHR
1 stop28h 35mUnited Airlines
Sun 9/216:50 amLHR - ORD
1 stop11h 15mUnited Airlines
Deal found 9/9$509
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 11/106:30 pmORD - LTN
1 stop13h 30mMultiple Airlines
Wed 11/198:00 amLTN - ORD
1 stop15h 20mMultiple Airlines
Deal found 9/8$509
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 9/3011:13 amORD - LGW
1 stop13h 07mMultiple Airlines
Sat 11/156:05 amLGW - ORD
2 stops38h 55mMultiple Airlines
Deal found 9/11$509
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/18:18 pmORD - LHR
1 stop32h 22mUnited Airlines
Fri 11/141:25 pmLHR - ORD
1 stop27h 53mUnited Airlines
Deal found 9/10$510

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

O'Hare Intl

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 10/27

7:50 pm-5:50 pm

1 stop17h 00m

London Gatwick

Mon 11/3

6:40 pm-4:20 pm

1 stop27h 40m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/28

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Tue 10/21

6:50 am-12:05 pm

1 stop11h 15m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/12

5:50 pm-7:55 am

Nonstop8h 05m

London Heathrow

Wed 11/19

6:50 am-12:10 pm

1 stop11h 20m

$506

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 12/3

6:30 pm-12:55 pm

1 stop12h 25m

London Luton

Thu 12/11

6:00 am-5:20 pm

1 stop17h 20m

$509

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Tue 10/14

10:40 am-12:00 pm

2 stops19h 20m

London Stansted

Tue 10/21

6:20 am-9:51 am

2 stops33h 31m

$511

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 11/1

8:18 pm-9:40 am

1 stop32h 22m

London Heathrow

Mon 11/10

12:05 pm-4:20 pm

1 stop34h 15m

$514

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/21

6:00 pm-8:20 am

Nonstop8h 20m

London Heathrow

Tue 9/30

2:05 pm-8:01 am

1 stop23h 56m

$516

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/24

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Fri 10/3

2:10 pm-5:20 pm

Nonstop9h 10m

$517

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 12/2

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Mon 12/8

11:55 am-5:20 pm

1 stop11h 25m

$518

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 12/5

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Wed 12/10

11:55 am-5:20 pm

1 stop11h 25m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
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The best insider tips for Chicago O'Hare Intl Airport to London 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 Chicago O'Hare Intl Airport to London trip
Airlines
British Airways

BA's Club Suite offers private pods with doors for enhanced privacy on long-haul flights.


BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

Iberia

Iberia's premium economy offers 37-inch legroom and noise-canceling headphones for long-haul flights.


Iberia's Wi-Fi is free for messaging apps for Business class and Iberia Plus members.

Read more about Iberiaby Emily Zemler
Airports
ORD

For a smooth departure from ORD, use the free shuttle train to navigate between terminals efficiently.

Read more about ORDby Ramsey Qubein
LHR

Take the Heathrow Express for the fastest route to central London from LHR, arriving at Paddington Station.

Read more about LHRby 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
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 O'Hare Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from O'Hare Intl with our price prediction graph.
Estimated 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 Chicago O'Hare Intl Airport to London

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to London. Price data was last updated on August 29, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to London is 17 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 Chicago O'Hare Intl Airport to London?

Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $661). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of $1,098). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to LON?

Find hourly flight availability from O'Hare Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to London in the morning. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to London. Price data was last updated on December 1, 2024.

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

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

Explore weekly flight availability from O'Hare Intl to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 11, 2025.

The most flights from ORD to LON are scheduled on a Tuesday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (52 on average).

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

Share of 1-stop round-trip flights from Chicago O'Hare Intl Airport to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 71% of 1-stop itineraries from Chicago O'Hare Intl Airport to London on Cheapflights.

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

Average round-trip fare for 1-stop flights from Chicago O'Hare Intl Airport to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $499.

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

Shortest average travel time for 1-stop one-way flights from Chicago O'Hare Intl Airport to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 10m.

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

Average layover duration for 1-stop one-way flights from Chicago O'Hare Intl Airport to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 10m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Icelandair from Chicago O'Hare Intl Airport to London 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.

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from Chicago O'Hare Intl Airport to London?

    A quick flight from Chicago O'Hare Intl Airport to London can take about 8h 20m. SWISS provides one of the quickest options available for as low as $506. The distance from Chicago O'Hare Intl Airport to London is about 3939 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on JetBlue is currently your cheapest option to London, with prices starting at $51. Additional round-trip tickets that might be worth considering are offered by SWISS and Scandinavian Airlines, with the lowest prices starting at $257 and $338, respectively. You may be able to fly from Chicago O'Hare Intl Airport to London for 93% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $237 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include JetBlue from $324 and SWISS from $390 one-way.

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

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

    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 Chicago O'Hare Intl Airport to London on time: Aer Lingus (64%), American Airlines (62%), Air Canada (62%).

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

    Looking at all options, your cheapest flight can be booked for $388. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $423 on average, our data indicates $2,490 when flying from Chicago O'Hare Intl Airport to London.

  • Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to London?

  • What are some popular things to do or see while on a layover in Reykjavik?

    The majority of Reykjavik visitors spend their time at Harpa, Hallgrímskirkja, and Laugardalslaug Geothermal Pool. Harpa, Hallgrímskirkja, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.3 mi, 23.2 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $58 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Chicago O'Hare Intl Airport to London flights?

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

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

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

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

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

    Yes. Cheapflights offers flight deals from O'Hare Intl to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $661). Flying from Chicago O'Hare Intl Airport to London in June is currently the most expensive (average of $1,098). 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 O'Hare Intl to London

Discover the top 10 airlines that operate flights from O'Hare Intl to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$632FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$701FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$338Average$597FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$909FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$430Average$920FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$472Average$654FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$502Average$794FlexibilityNo cancel feeOn-time70%
FinnairCheapest$554Average$759FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$554Average$804FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$562Average$824FlexibilityNo cancel feeOn-timeN/A

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