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$365+ Cheap flights from Chicago (CHI) 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LON
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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3. Compare prices and book

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Cheapflights Tip: The best prices from Chicago to London are usually found in September or October, booked 33 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Chicago to London

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 January 8, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$530
(oojo)

One-way from

$365
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$662

Good round-trip deal

$678 or less

Good one-way deal

$412 or less
Provider with most accurate pricing for Chicago (CHI)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-London (LON) flights.
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From Chicago (CHI) to London (LON)
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One-way flight from Chicago (CHI) to London (LON)
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Highest demand for flights based on searches. 21% potential increase in price ($208 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Chicago (CHI) to London (LON).
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Price to beat on a one-way flight from Chicago (CHI) to London (LON).
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Find flight deals from Chicago to London

Cheapest flights from Chicago to London
Explore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/67:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Fri 2/136:40 pmLHR - ORD
1 stop28h 05mScandinavian Airlines
Deal found 1/7$530
This Mytrip deal was found by Cheapflights users on 1/7. 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 1/267:20 pmORD - LGW
2 stops19h 40mMultiple Airlines
Sun 2/111:10 amLGW - ORD
2 stops35h 35mMultiple Airlines
Deal found 1/7$530
This Kiwi.com deal was found by Cheapflights users on 1/8. 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.
Thu 4/97:25 pmORD - LGW
1 stop13h 15mIcelandair
Sun 4/193:40 pmLGW - ORD
1 stop11h 45mIcelandair
Deal found 1/8$531
This Kiwi.com deal was found by Cheapflights users on 1/8. 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.
Tue 3/247:30 pmORD - LGW
1 stop10h 25mIcelandair
Fri 4/103:40 pmLGW - ORD
1 stop11h 45mIcelandair
Deal found 1/8$532
This FlightHub deal was found by Cheapflights users on 1/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:20 pmORD - LHR
2 stops32h 15mScandinavian Airlines
Mon 3/27:50 pmLHR - ORD
2 stops50h 55mScandinavian Airlines
Deal found 1/8$533
This Mytrip deal was found by Cheapflights users on 1/7. 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.
Sat 2/147:20 pmORD - LTN
2 stops16h 55mMultiple Airlines
Sat 2/216:00 amLTN - ORD
2 stops16h 45mMultiple Airlines
Deal found 1/7$533
This oojo deal was found by Cheapflights users on 1/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:00 pmORD - LGW
1 stop14h 00mTAP AIR PORTUGAL
Tue 4/149:15 pmLGW - ORD
2 stops24h 45mTAP AIR PORTUGAL
Deal found 1/6$533
This Mytrip deal was found by Cheapflights users on 1/7. 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.
Fri 1/99:00 pmORD - STN
1 stop17h 05mMultiple Airlines
Tue 1/138:30 amSTN - ORD
1 stop16h 45mMultiple Airlines
Deal found 1/7$533
This FlightHub deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/57:20 pmORD - LHR
1 stop16h 20mScandinavian Airlines
Wed 2/117:05 amLHR - ORD
2 stops39h 40mScandinavian Airlines
Deal found 1/6$534
This Icelandair deal was found by Cheapflights users on 1/8. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:25 pmORD - LGW
1 stop13h 15mIcelandair
Sun 4/193:40 pmLGW - ORD
1 stop11h 45mIcelandair
Deal found 1/8$534
This Mytrip deal was found by Cheapflights users on 1/6. 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 2/27:20 pmORD - STN
2 stops20h 00mMultiple Airlines
Fri 2/69:45 pmSTN - ORD
2 stops25h 00mMultiple Airlines
Deal found 1/6$534
This Kiwi.com deal was found by Cheapflights users on 1/8. 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.
Thu 4/97:25 pmORD - LHR
1 stop10h 30mIcelandair
Sun 4/191:05 pmLHR - ORD
1 stop11h 10mIcelandair
Deal found 1/8$535

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago 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 January 8, 2026.
Use the filters below to find and compare flights from Chicago to London that are best for you.

Fly from

Chicago

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 2/4

6:30 pm-5:05 pm

2 stops16h 35m

London Luton

Wed 2/11

6:50 am-5:20 pm

2 stops16h 30m

$535

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Thu 2/5

7:20 pm-8:10 pm

2 stops18h 50m

London Luton

Sat 2/7

8:50 pm-4:55 pm

2 stops26h 05m

$536

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 4/8

7:25 pm-2:40 pm

1 stop13h 15m

London Gatwick

Sat 4/18

3:40 pm-6:15 pm

1 stop32h 35m

$537

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 4/5

7:25 pm-2:40 pm

1 stop13h 15m

London Gatwick

Mon 4/20

3:40 pm-6:15 pm

1 stop32h 35m

$537

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 1/21

7:20 pm-11:05 pm

2 stops21h 45m

London Luton

Sat 1/24

6:00 am-4:45 pm

2 stops16h 45m

$546

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 1/18

8:25 pm-3:45 pm

1 stop13h 20m

London Gatwick

Tue 1/27

9:20 pm-3:00 pm

2 stops23h 40m

$553

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/3

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Thu 5/7

1:05 pm-6:15 pm

1 stop11h 10m

$554

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 2/22

6:30 pm-10:30 pm

2 stops22h 00m

London Luton

Sun 3/1

6:20 am-5:20 pm

2 stops17h 00m

$559

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 1/18

12:50 pm-4:15 pm

2 stops21h 25m

London Stansted

Tue 1/27

8:10 am-10:05 pm

3 stops19h 55m

$561

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 1/28

7:10 pm-3:05 pm

1 stop13h 55m

London Gatwick

Fri 2/6

9:25 pm-2:45 pm

2 stops47h 20m

$572

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 60 results
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Compare providers for flights from Chicago 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 Chicago to London in January.
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
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 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-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-London flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Chicago-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-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-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 Chicago to London

Have a flexible travel schedule? Discover the best time to fly to London from Chicago 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 to London

How far ahead should I book a flight from Chicago to London?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to London. Price data was last updated on January 2, 2026.

The best time to book flights from Chicago to London is 33 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 to London?

Currently, June is the cheapest month in which you can book a flight from Chicago to London (average of $375). Flying from Chicago 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 CHI to LON?

Find hourly flight availability from Chicago 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 January 8, 2026.

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

Weekly flight availability from Chicago to London

Explore weekly flight availability from Chicago 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 January 8, 2026.

The most flights from CHI to LON are scheduled on a Monday (39 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (39 on average).

How much does it cost to fly round-trip from Chicago to London?

What’s the top layover airport for flights from Chicago to London?

Share of 1-stop round-trip flights from Chicago 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 to London on Cheapflights.

What’s the cheapest layover airport for flights from Chicago to London?

Average round-trip fare for 1-stop flights from Chicago 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 $490.

What’s the fastest layover option from Chicago to London?

Shortest average travel time for 1-stop one-way flights from Chicago 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 03m.

Which airport typically offers the quickest layover for flights from Chicago to London?

Average layover duration for 1-stop one-way flights from Chicago 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 03m.

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 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 to London trip
Airlines
British Airways

BA's Club Suite offers solo pods with doors for privacy; available on most 777s and A350s.


BA's World Traveller Plus provides 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, footrests, and noise-canceling headphones for long-haul comfort.


Iberia's business class features lay-flat beds with massage function and adjustable pillows for ultimate relaxation.

Read more about IberiaBy Emily Zemler
Airports
ORD

For a quick departure from ORD, consider taking the 'L' train to avoid Chicago traffic delays.

Read more about ORDBy Ramsey Qubein
LHR

Use 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 January 8, 2026.
See what other customers who have flown with United Airlines, American Airlines, and Icelandair from Chicago to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,141 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,141 reviews
United Airlines
7.4
Good
9,141 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
American Airlines
7.2
Good
11,095 reviews
United Airlines
7.4
Good
9,141 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Icelandair
7.1
Good
593 reviews
United Airlines
7.4
Good
9,141 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Iberia
7.0
Good
3,076 reviews
United Airlines
7.4
Good
9,141 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
British Airways
6.7
Okay
7,657 reviews
United Airlines
7.4
Good
9,141 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 to London?

    Departing from Chicago to London will take you 7h 50m. There are 3939 mi between Chicago and London. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to London round-trip?

    JetBlue, at $51, was found to be the cheapest airline from Chicago to London.Alternate airlines to your destination round-trip include SWISS and Scandinavian Airlines. JetBlue is 93% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Chicago to London one-way?

    $135 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Scandinavian Airlines and Icelandair, with prices starting from $207 and $219, respectively.

  • What are the most popular routes from Chicago to London?

    The most popular route from Chicago to London is Chicago O'Hare Intl - London Heathrow. You may also consider Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City.

  • What are the most reliable airlines from Chicago to London?

    Before booking your flight to London from Chicago, check out the most reliable airlines to get you to your destination on time: Aer Lingus (68%), American Airlines (61%), Alaska Airlines( 61%).

  • What are the cheapest flights from Chicago 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 $406 on average, our data indicates $2,584 when flying from Chicago to London.

  • Where are the most common layover locations when flying from Chicago to London?

    Of the flights from Chicago to London that have layovers, most of them stop in Reykjavik. Dublin sees the next most layovers on Chicago to London flights.

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

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are located about 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 $52 per day to make their sightseeing more efficient.

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

    Most Dublin visitors opt to spend their time at Glasnevin Cemetery, St. Patrick's Cathedral, and Molly Malone Statue. Glasnevin Cemetery, St. Patrick's Cathedral and Molly Malone Statue are located about 3.9 mi, 6.1 mi, and 5.8 mi, respectively from Dublin if you are interested in checking them out. Those on a layover in Dublin in need of a rental car can book one at Dublin for about $22.

  • Where are the least popular layover locations for Chicago to London flights?

    Chicago to London flights have a layover in Lisbon least often.

  • Can I find deals for flights from Chicago to London that include hotel bookings?

    Yes. In addition to deals on Chicago to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to London?

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

  • Can I find deals for business class flights from Chicago to London?

    Yes. Cheapflights offers flight deals from Chicago 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 to London?

    Currently, June is the cheapest month in which you can book a flight from Chicago to London (average of $375). Flying from Chicago 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.

See more FAQs

Traveling to a place near London?

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

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Alternative routes for Chicago to London

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Heathrow flights
O'Hare Intl to Gatwick flights
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Top 10 airlines flying from Chicago to London

Discover the top 10 airlines that operate flights from Chicago 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$505FlexibilityNo cancel feeOn-time62%
SWISSCheapest$257Average$674FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$331Average$570FlexibilityNo cancel feeOn-time77%
DeltaCheapest$345Average$924FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$428Average$596FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$476Average$670FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$480Average$1,108FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$495Average$780FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$502Average$796FlexibilityNo cancel feeOn-time70%
FinnairCheapest$517Average$766FlexibilityNo cancel feeOn-time76%

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