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$374+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 October, booked 49 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 December 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:30 pmORD - LHR
1 stop10h 20mIcelandair
Sat 1/3112:15 pmLHR - ORD
1 stop11h 05mIcelandair
Deal found 12/11$559
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:24 pmORD - LHR
1 stop11h 16mMultiple Airlines
Thu 1/1511:10 amLHR - ORD
1 stop13h 15mMultiple Airlines
Deal found 12/9$571
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/311:24 pmORD - LHR
1 stop11h 16mMultiple Airlines
Wed 1/146:50 amLHR - ORD
1 stop11h 20mMultiple Airlines
Deal found 12/10$576
This Icelandair deal was found by Cheapflights users on 12/9. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:30 pmORD - LHR
1 stop10h 20mIcelandair
Wed 1/2112:15 pmLHR - ORD
1 stop11h 05mIcelandair
Deal found 12/9$605
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/316:21 pmORD - LHR
1 stop10h 29mUnited Airlines
Tue 1/2011:10 amLHR - ORD
1 stop13h 15mUnited Airlines
Deal found 12/9$612
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/105:50 pmORD - LHR
Nonstop8h 05mUnited Airlines
Fri 3/206:50 amLHR - ORD
1 stop11h 20mUnited Airlines
Deal found 12/10$614
This Delta deal was found by Cheapflights users on 12/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:05 amORD - LHR
1 stop17h 45mDelta
Wed 1/218:40 amLHR - ORD
1 stop11h 40mDelta
Deal found 12/9$618
This Air Canada deal was found by Cheapflights users on 12/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/103:35 pmORD - LHR
1 stop9h 35mAir Canada
Fri 3/206:50 amLHR - ORD
2 stops16h 55mAir Canada
Deal found 12/10$620
This Gotogate deal was found by Cheapflights users on 12/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:30 pmORD - LHR
1 stop19h 00mIcelandair
Sun 1/1812:15 pmLHR - ORD
1 stop11h 05mIcelandair
Deal found 12/10$621
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Tue 12/309:05 pmORD - LHR
Nonstop8h 10mUnited Airlines
Fri 1/168:30 amLHR - ORD
1 stop12h 50mUnited Airlines
Deal found 12/9$623
This Kiwi.com deal was found by Cheapflights users on 12/11. 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.
Thu 12/112:40 pmORD - LHR
1 stop13h 00mMultiple Airlines
Mon 12/156:40 pmLHR - ORD
1 stop27h 40mMultiple Airlines
Deal found 12/11$624
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:35 pmORD - LCY
2 stops16h 05mLufthansa
Wed 12/249:50 amLCY - ORD
1 stop16h 15mLufthansa
Deal found 12/11$695

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 December 12, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$553
(CrystalTravel)

One-way from

$374
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$824

Good round-trip deal

$677 or less

Good one-way deal

$443 or less
Provider with most accurate pricing for Chicago O'Hare Intl-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-London (LON) flights.
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From Chicago O'Hare Intl to London (LON)
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One-way flight from Chicago O'Hare Intl to London (LON)
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in December 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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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 December 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 - STN

ORDSTN

Chicago O'Hare Intl

Sun 1/11

12:50 pm-11:30 am

2 stops16h 40m

London Stansted

Tue 1/20

8:25 pm-7:45 pm

3 stops29h 20m

$560

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 1/29

10:29 am-9:20 am

2 stops16h 51m

London Heathrow

Fri 2/6

10:20 am-4:45 pm

1 stop12h 25m

$561

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 1/11

9:00 pm-10:00 pm

1 stop19h 00m

London Luton

Tue 1/20

9:00 am-7:15 pm

1 stop16h 15m

$563

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 3/10

10:40 am-5:40 pm

2 stops26h 00m

London Heathrow

Fri 4/10

9:05 pm-4:10 pm

2 stops25h 05m

$564

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sat 1/31

7:20 pm-10:55 pm

2 stops21h 35m

London Luton

Sat 2/7

8:50 pm-4:55 pm

2 stops26h 05m

$564

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 1/14

9:00 pm-9:05 pm

1 stop18h 05m

London Stansted

Thu 1/22

6:30 am-7:15 pm

1 stop18h 45m

$577

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 1/14

9:00 pm-9:05 pm

1 stop18h 05m

London Stansted

Wed 1/21

8:30 am-7:15 pm

1 stop16h 45m

$577

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sat 1/31

7:20 pm-11:35 pm

2 stops22h 15m

London Stansted

Sat 2/7

11:55 am-4:55 pm

2 stops35h 00m

$581

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 1/27

6:30 pm-2:50 pm

1 stop14h 20m

London Luton

Tue 2/10

7:00 am-5:20 pm

1 stop16h 20m

$585

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Tue 2/17

6:30 pm-8:05 pm

2 stops19h 35m

London Luton

Wed 2/25

6:50 am-5:20 pm

2 stops16h 30m

$587

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 60 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Chicago O'Hare Intl Airport-London flight deals on Cheapflights vs. Justfly.com >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 Justfly.com the most. Justfly.com 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?

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 December 5, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to London is 49 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, June is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $375). Flying from Chicago O'Hare Intl Airport to London in July is currently the most expensive (average of $604). 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 December 12, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to London in the evening. Doing so could potentially save you 35% on the flight price compared to flying in the morning, 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 Sunday evenings when fares are most often at their lowest. Saturday 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 December 12, 2025.

The most flights from ORD to LON are scheduled on a Monday (45 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (37 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 63% 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 $627.

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 25m.

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 11m.

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 168 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 Thursday 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, United Airlines have had the lowest number of delays on this route, with just 23% 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
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.

Read more about British AirwaysBy Gabriel Leigh
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

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 December 12, 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.
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,049 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Icelandair
7.0
Good
589 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Iberia
7.0
Good
3,045 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
British Airways
6.7
Okay
7,571 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 05m. Scandinavian Airlines provides one of the quickest options available for as low as $620. 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 $135 on JetBlue. Other airlines that offer cheap prices include Scandinavian Airlines from $207 and Icelandair from $218 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: Air Canada (64%), Austrian Airlines (64%), United Airlines (64%).

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

    Looking at all options, your cheapest flight can be booked for $374. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $436 on average, our data indicates $2,529 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 $50 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, June is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London (average of $375). Flying from Chicago O'Hare Intl Airport to London in July is currently the most expensive (average of $604). 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.

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Horley
Kingston upon Thames
Wembley
Folkestone
Eastbourne

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Alternative routes for O'Hare Intl to London

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$632FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$674FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$338Average$577FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$909FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$450Average$639FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$460Average$965FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$481Average$653FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$502Average$795FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$505Average$793FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$522Average$919FlexibilityNo cancel feeOn-time75%

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