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$393+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to London are usually found in February or October, booked 71 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap 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 April 24, 2026.

This deal was found by Cheapflights users on 4/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:25 pm
ORD
-
LHR
1 stop10h 30m
Icelandair
Wed 5/201:05 pm
LHR
-
ORD
1 stop14h 20m
Icelandair
Deal found 4/19$694
This Mytrip deal was found by Cheapflights users on 4/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:25 pm
ORD
-
STN
2 stops19h 05m
Multiple Airlines
Tue 5/193:10 pm
STN
-
ORD
2 stops30h 50m
Multiple Airlines
Deal found 4/20$695
This deal was found by Cheapflights users on 4/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:25 pm
ORD
-
LGW
1 stop13h 15m
Icelandair
Sun 10/43:40 pm
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 4/20$697
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/304:30 pm
ORD
-
LGW
1 stop31h 50m
Multiple Airlines
Tue 10/61:05 pm
LGW
-
ORD
1 stop24h 56m
Multiple Airlines
Deal found 4/20$699
This Mytrip deal was found by Cheapflights users on 4/21. 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.
Tue 5/127:25 pm
ORD
-
LGW
2 stops21h 25m
Multiple Airlines
Tue 5/199:35 pm
LGW
-
ORD
3 stops28h 05m
Multiple Airlines
Deal found 4/21$701
This deal was found by Cheapflights users on 4/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:25 pm
ORD
-
LHR
1 stop10h 30m
Icelandair
Mon 5/181:05 pm
LHR
-
ORD
1 stop14h 20m
Icelandair
Deal found 4/19$702
This Mytrip deal was found by Cheapflights users on 4/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:25 pm
ORD
-
LGW
3 stops28h 15m
Multiple Airlines
Wed 5/278:50 pm
LGW
-
ORD
3 stops28h 50m
Multiple Airlines
Deal found 4/20$702
This Mytrip deal was found by Cheapflights users on 4/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:25 pm
ORD
-
STN
2 stops19h 25m
Multiple Airlines
Tue 5/1212:30 pm
STN
-
ORD
2 stops33h 30m
Multiple Airlines
Deal found 4/19$702
This FlightHub deal was found by Cheapflights users on 4/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:20 pm
ORD
-
LHR
2 stops32h 15m
Scandinavian Airlines
Tue 10/276:40 am
LHR
-
ORD
2 stops16h 05m
Scandinavian Airlines
Deal found 4/20$704
This Gotogate deal was found by Cheapflights users on 4/20. 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.
Wed 9/307:25 pm
ORD
-
LGW
1 stop13h 15m
Icelandair
Wed 10/73:40 pm
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 4/20$705
This deal was found by Cheapflights users on 4/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:45 pm
ORD
-
LHR
1 stop12h 35m
Aer Lingus
Sun 5/171:25 pm
LHR
-
ORD
1 stop11h 50m
Aer Lingus
Deal found 4/19$706
This Gotogate deal was found by Cheapflights users on 4/20. 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.
Sat 11/286:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Sat 12/1211:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Deal found 4/20$706

Find 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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$694

One-way from

$393
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$715

Good round-trip deal

$930 or less

Good one-way deal

$490 or less
Provider with most accurate pricing for Chicago O'Hare Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago O'Hare Intl-London (LON) flights.
Search Deals
From Chicago O'Hare Intl to London (LON)
Search Deals
One-way flight from Chicago O'Hare Intl to London (LON)
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to London (LON).
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to London (LON).
Search Deals

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 April 24, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD - SEN

ORDSEN

Chicago O'Hare Intl

Sun 5/10

2:15 pm-7:35 pm

2 stops23h 20m

London Southend

Tue 5/19

6:30 am-8:08 pm

2 stops19h 38m

$810

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 6/2

8:50 am-1:25 pm

3 stops22h 35m

London Luton

Tue 6/9

3:15 pm-6:15 pm

2 stops33h 00m

$811

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 5/27

9:55 am-12:35 pm

3 stops20h 40m

London Luton

Tue 6/2

9:40 am-7:25 pm

2 stops15h 45m

$813

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 9/8

4:05 pm-12:55 pm

2 stops14h 50m

London Luton

Fri 9/18

8:30 am-6:15 pm

2 stops15h 45m

$823

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 5/10

12:59 pm-9:40 pm

3 stops26h 41m

London Luton

Thu 5/14

5:30 pm-4:00 pm

2 stops28h 30m

$855

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/25

4:30 pm-6:45 am

Nonstop8h 15m

London Heathrow

Thu 9/3

6:50 am-12:00 pm

1 stop11h 10m

$859

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 5/31

9:55 am-9:55 pm

2 stops30h 00m

London Stansted

Sat 6/6

3:25 pm-11:56 pm

3 stops38h 31m

$870

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/4

6:21 pm-12:05 pm

1 stop11h 44m

London Heathrow

Tue 5/12

6:30 am-4:29 pm

2 stops15h 59m

$874

ChicagoLondon

ORD - SEN

ORDSEN

Chicago O'Hare Intl

Mon 5/4

11:05 am-11:20 am

2 stops18h 15m

London Southend

Tue 5/12

6:30 am-8:08 pm

2 stops19h 38m

$874

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Sun 5/3

4:20 pm-9:50 am

1 stop11h 30m

London City

Tue 5/12

9:20 am-2:15 pm

1 stop10h 55m

$888

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/19

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from O'Hare Intl to London

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 O'Hare Intl to London in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 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 Chicago O'Hare Intl Airport-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-London flights, Cheapflights users trust FlightHub the most. FlightHub 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 Chicago O'Hare Intl Airport-London 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 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?

The best time to book flights from Chicago O'Hare Intl Airport to London is 42 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $200). Flying from Chicago O'Hare Intl Airport to London in December is currently the most expensive (average of $1,933). 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 April 24, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to London as you normally would.

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 April 24, 2026.

The most flights from ORD to LON are scheduled on a Monday (58 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (57 on average).

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to London?

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 58% 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.

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $478.

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 Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 10h 23m.

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 00m.

How often are flights from Chicago to London delayed?

About 25% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 170 minutes.

What is the most punctual flight time for Chicago to London flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to London flights?

Over the last year, American Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.

The best insider tips for Chicago O'Hare Intl Airport to London 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 Chicago O'Hare Intl Airport to London trip
Our travel experts
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
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
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 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 April 24, 2026.
Peruse reviews from past customers who have flown with United Airlines,American Airlines, andIcelandair 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.
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,644 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,664 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Icelandair
7.0
Good
639 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Iberia
7.0
Good
3,195 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
British Airways
6.7
Okay
7,910 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 15m. United Airlines provides one of the quickest options available for as low as $859. 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 Scandinavian Airlines and Delta, with the lowest prices starting at $321 and $345, 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 $135 on JetBlue. Other airlines that offer cheap prices include Icelandair from $219 and TAP AIR PORTUGAL from $237 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 Stansted 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: Air Canada (89%), Austrian Airlines (89%), United Airlines (89%).

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

    Looking at all options, your cheapest flight can be booked for $339. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $608 on average, our data indicates $2,349 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.

  • 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 $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?

    Chicago O'Hare Intl Airport to London flights have a layover in Dublin 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $200). Flying from Chicago O'Hare Intl Airport to London in December is currently the most expensive (average of $1,933). 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 London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Borehamwood
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
Sutton
Stansted

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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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$373FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$321Average$579FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$877FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$377Average$728FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$428Average$645FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$465Average$665FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$481Average$807FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$513Average$831FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$522Average$677FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$531Average$755FlexibilityNo cancel feeOn-time70%

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