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$377+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in April or February, booked 82 days in advance, depart on a Wednesday or Tuesday and return on a Friday

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 June 12, 2025.

Round-trip from

$671
(Kiwi.com)

One-way from

$377
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$1,130

Good round-trip deal

$667 or less

Good one-way deal

$496 or less
From Chicago O'Hare Intl to London (LON)
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One-way flight from Chicago O'Hare Intl to London (LON)
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Highest demand for flights based on searches. 20% potential increase in price ($201 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).
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Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).
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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 June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/12. 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.
Fri 8/157:15 pmORD - LHR
1 stop12h 20mScandinavian Airlines
Tue 9/29:05 pmLHR - ORD
2 stops49h 05mScandinavian Airlines
Deal found 6/12$669
This SWISS deal was found by Cheapflights users on 6/12. 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.
Tue 11/47:05 pmORD - LCY
1 stop17h 35mSWISS
Tue 11/119:15 amLCY - ORD
1 stop13h 00mSWISS
Deal found 6/12$669
This SWISS deal was found by Cheapflights users on 6/12. 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.
Mon 7/287:05 pmORD - LGW
1 stop16h 45mSWISS
Mon 8/116:35 pmLGW - ORD
1 stop27h 20mSWISS
Deal found 6/12$670
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 8/227:25 pmORD - LHR
1 stop10h 30mIcelandair
Thu 8/281:05 pmLHR - ORD
1 stop11h 10mIcelandair
Deal found 6/10$671
This Virgin Atlantic deal was found by Cheapflights users on 6/10. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2010:37 amORD - LGW
1 stop17h 23mVirgin Atlantic
Tue 7/2912:00 pmLGW - ORD
2 stops18h 09mVirgin Atlantic
Deal found 6/10$671
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
Mon 8/43:14 pmORD - LHR
1 stop10h 36mIberia
Wed 8/139:15 amLHR - ORD
Nonstop8h 40mIberia
Deal found 6/12$672
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 7/287:25 pmORD - LGW
1 stop10h 20mIcelandair
Wed 8/63:40 pmLGW - ORD
1 stop11h 35mIcelandair
Deal found 6/12$672
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sun 7/209:50 pmORD - LHR
1 stop27h 50mUnited Airlines
Tue 7/295:40 pmLHR - ORD
1 stop31h 49mUnited Airlines
Deal found 6/10$673
This Mytrip deal was found by Cheapflights users on 6/12. 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 9/17:25 pmORD - LGW
1 stop10h 20mMultiple Airlines
Mon 9/810:00 amLGW - ORD
2 stops18h 28mMultiple Airlines
Deal found 6/12$673
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1910:30 pmORD - LCY
1 stop11h 55mMultiple Airlines
Wed 8/279:25 amLCY - ORD
1 stop12h 30mMultiple Airlines
Deal found 6/10$675
This Mytrip deal was found by Cheapflights users on 6/11. 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 8/47:25 pmORD - STN
2 stops20h 45mMultiple Airlines
Tue 8/197:00 amSTN - ORD
2 stops17h 15mMultiple Airlines
Deal found 6/11$675
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/67:00 amORD - LGW
1 stop21h 00mDelta
Wed 8/612:00 pmLGW - ORD
1 stop15h 43mDelta
Deal found 6/12$676

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 June 12, 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 - LHR

ORDLHR

Chicago O'Hare Intl

Fri 8/15

7:15 pm-1:35 pm

1 stop12h 20m

London Heathrow

Tue 9/2

9:05 pm-4:10 pm

2 stops49h 05m

$669

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 8/20

2:20 pm-8:50 am

1 stop12h 30m

London City

Wed 8/27

9:25 am-3:55 pm

1 stop12h 30m

$669

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 7/28

7:05 pm-5:50 pm

1 stop16h 45m

London Gatwick

Mon 8/11

6:35 pm-3:55 pm

1 stop27h 20m

$670

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 8/22

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Thu 8/28

1:05 pm-6:15 pm

1 stop11h 10m

$671

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 7/20

10:37 am-10:00 am

1 stop17h 23m

London Gatwick

Tue 7/29

12:00 pm-12:09 am

2 stops18h 09m

$671

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 8/4

3:14 pm-7:50 am

1 stop10h 36m

London Heathrow

Wed 8/13

9:15 am-11:55 am

Nonstop8h 40m

$672

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 7/28

7:25 pm-11:45 am

1 stop10h 20m

London Gatwick

Wed 8/6

3:40 pm-9:15 pm

1 stop11h 35m

$672

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 7/20

9:50 pm-7:40 am

1 stop27h 50m

London Heathrow

Tue 7/29

5:40 pm-7:29 pm

1 stop31h 49m

$673

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 9/1

7:25 pm-11:45 am

1 stop10h 20m

London Gatwick

Mon 9/8

10:00 am-10:28 pm

2 stops18h 28m

$673

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Tue 8/19

10:30 pm-4:25 pm

1 stop11h 55m

London City

Wed 8/27

9:25 am-3:55 pm

1 stop12h 30m

$675

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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
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
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.

Read more about British Airwaysby Gabriel Leigh
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
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
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
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 June 9, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to London is 82 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 $1,108). 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 June 12, 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 15% 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 at noon 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 June 12, 2025.

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

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 June 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from Chicago to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Flying on Icelandair is currently your cheapest option to London, with prices starting at $671. Additional round-trip tickets that might be worth considering are offered by Virgin Atlantic and British Airways, with the lowest prices starting at $671 and $672, respectively. You may be able to fly from Chicago O'Hare Intl Airport to London for 14% 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 $379 on Air Canada. Other airlines that offer cheap prices include ITA Airways from $379 and British Airways from $380 one-way.

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

    Most travelers choose Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City when deciding on the best route 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: Royal Jordanian (81%), SriLankan Airlines (75%), Air Canada (72%).

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

    Looking at all options, your cheapest flight can be booked for $412. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $377 on average our data indicates $2,680 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?

    Chicago O'Hare Intl Airport to London flights have a layover in Reykjavik most often. Reykjavik is followed by Dublin in terms of the most popular layover location on flights 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 Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool can be accessed by traveling approximately 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $66 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Dublin?

    Dublin travelers tend to visit Molly Malone Statue, Parnell Square, and St. Patrick's Cathedral more than any other notable places. Molly Malone Statue, Parnell Square and St. Patrick's Cathedral are located about 5.8 mi, 5.0 mi, and 6.1 mi, respectively from Dublin if you are interested in checking them out. Travelers can rent a car at Dublin for an average daily rate of $24 to make sightseeing during their layover a little easier.

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

    Chicago O'Hare Intl Airport to London flights have a layover in Copenhagen least often.

  • 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 $1,108). 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
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Sutton
Aylesbury
Chelmsford
Brentwood
Chichester
Wembley
Arundel

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Alternative routes for O'Hare Intl to London

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Heathrow flights
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Midway to Manchester flights
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Midway to Bristol flights
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$257Average$700FlexibilityNo cancel feeOn-time79%
DeltaCheapest$345Average$935FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$381Average$601FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$440Average$921FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$465Average$649FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$507Average$792FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$516Average$869FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$554Average$751FlexibilityNo cancel feeOn-time67%
FinnairCheapest$567Average$745FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$569Average$803FlexibilityNo cancel feeOn-timeN/A

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