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$527+ Cheap flights from London (LON) to Chicago (CHI)

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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Find cheap flights from London to Chicago with Cheapflights

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 London to Chicago are usually found in February or September, booked 88 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Find flight deals from London to Chicago

Cheapest flights from London to Chicago
Explore the most affordable flight options available from London to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This The Travel House deal was found by Cheapflights users on 10/27. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:30 pmLHR - ORD
1 stop27h 15mScandinavian Airlines
Wed 11/197:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 10/27$532
This Mytrip deal was found by Cheapflights users on 10/27. 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 11/248:30 amSTN - ORD
2 stops14h 50mMultiple Airlines
Mon 12/86:30 pmORD - STN
2 stops17h 50mMultiple Airlines
Deal found 10/27$532
This Justfly.com deal was found by Cheapflights users on 10/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:30 pmLHR - ORD
1 stop26h 15mTAP AIR PORTUGAL
Fri 11/288:15 pmORD - LHR
1 stop20h 25mTAP AIR PORTUGAL
Deal found 10/28$533
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Thu 12/48:50 amLGW - ORD
2 stops14h 30mMultiple Airlines
Mon 12/86:30 pmORD - LGW
2 stops20h 30mMultiple Airlines
Deal found 10/29$534
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/137:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Mon 11/247:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 10/28$534
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Thu 12/46:30 amSTN - ORD
2 stops16h 50mMultiple Airlines
Mon 12/86:30 pmORD - STN
2 stops17h 50mMultiple Airlines
Deal found 10/28$534
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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.
Wed 11/1910:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Wed 11/267:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/29$535
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/49:20 pmSTN - ORD
2 stops21h 50mMultiple Airlines
Wed 11/124:20 pmORD - STN
2 stops22h 35mMultiple Airlines
Deal found 10/28$535
This Mytrip deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:15 amLGW - ORD
2 stops35h 30mMultiple Airlines
Mon 12/87:20 pmORD - LGW
2 stops19h 40mMultiple Airlines
Deal found 10/29$536
This The Travel House deal was found by Cheapflights users on 10/27. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/236:40 amLHR - ORD
2 stops16h 05mScandinavian Airlines
Sun 11/307:20 pmORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 10/27$536
This Scandinavian Airlines deal was found by Cheapflights users on 10/27. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Sun 11/167:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/27$538
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/1310:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Sun 11/237:20 pmORD - LHR
1 stop16h 20mScandinavian Airlines
Deal found 10/28$539

Cheap flight deals from London to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Chicago (CHI). 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 October 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$532
(Mytrip)

One-way from

$527
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$731

Good round-trip deal

$717 or less

Good one-way deal

$594 or less
Provider with most accurate pricing for London (LON)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Chicago (CHI) flights.
Search Deals
From London (LON) to Chicago (CHI)
Search Deals
One-way flight from London (LON) to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from London (LON) to Chicago (CHI).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Chicago 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 October 29, 2025.
Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

London

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Thu 1/8

2:00 pm-9:13 am

1 stop25h 13m

Chicago Midway

Mon 1/12

10:18 am-10:00 am

1 stop17h 42m

$551

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 12/8

11:30 am-5:55 pm

1 stop12h 25m

Chicago O'Hare Intl

Tue 12/23

3:50 pm-7:50 am

1 stop10h 00m

$551

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/3

7:30 pm-4:45 pm

1 stop27h 15m

Chicago O'Hare Intl

Wed 1/7

7:20 pm-4:00 pm

1 stop14h 40m

$569

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 12/6

10:20 am-4:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Sun 12/7

7:20 pm-6:30 pm

1 stop17h 10m

$569

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 12/4

6:50 am-8:05 pm

2 stops19h 15m

Chicago O'Hare Intl

Mon 12/8

6:50 pm-10:20 pm

2 stops21h 30m

$569

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 2/5

4:30 pm-4:45 pm

2 stops30h 15m

Chicago O'Hare Intl

Sun 2/8

7:10 pm-11:00 pm

3 stops21h 50m

$577

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 12/5

7:50 pm-4:45 pm

2 stops26h 55m

Chicago O'Hare Intl

Wed 1/7

7:20 pm-9:35 pm

2 stops20h 15m

$582

LondonChicago

SEN - ORD

SENORD

London Southend

Thu 12/4

6:50 am-6:25 pm

2 stops17h 35m

Chicago O'Hare Intl

Mon 12/8

6:50 pm-7:45 pm

2 stops18h 55m

$583

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 12/8

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Tue 12/23

3:50 pm-9:45 am

1 stop11h 55m

$587

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 11/19

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Wed 12/3

6:30 pm-10:55 am

1 stop10h 25m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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Compare providers for flights from London to Chicago

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 London to Chicago in October.
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
oojoPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Thrive TravelPrice Accuracy3 starsTrust 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 London-Chicago flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on London-Chicago flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from London-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Chicago flights, Cheapflights users trust CheapOair the most. CheapOair 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 London-Chicago 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 London to Chicago

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

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

Use this chart to determine the optimal time to book a round-trip flight from London to Chicago. Price data was last updated on October 24, 2025.

The best time to book flights from London to Chicago is 88 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 London to Chicago?

Currently, March is the cheapest month in which you can book a flight from London to Chicago (average of $404). Flying from London to Chicago in July is currently the most expensive (average of $673). 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 LON to CHI?

Find hourly flight availability from London to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 41% on flights from London to Chicago by exploring options for tickets in the evening.

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

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 56% of 1-stop itineraries from London to Chicago on Cheapflights.

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

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

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

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

Shortest average travel time for 1-stop one-way flights from London to Chicago, 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: 11h 10m.

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

Average layover duration for 1-stop one-way flights from London to Chicago, 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 05m.

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated October 29, 2025.
See what other customers who have flown with Finnair, United Airlines, and American Airlines from London to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,333 reviews

Boarding

7.6

Comfort

7.4

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,333 reviews
Finnair
7.6
Good
1,333 reviews

Boarding

7.6

Comfort

7.4

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
United Airlines
7.4
Good
9,001 reviews
Finnair
7.6
Good
1,333 reviews

Boarding

7.6

Comfort

7.4

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
American Airlines
7.2
Good
11,030 reviews
Finnair
7.6
Good
1,333 reviews

Boarding

7.6

Comfort

7.4

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.1
Good
562 reviews
Finnair
7.6
Good
1,333 reviews

Boarding

7.6

Comfort

7.4

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,487 reviews
Finnair
7.6
Good
1,333 reviews

Boarding

7.6

Comfort

7.4

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Related info for your journey

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

    For as low as $593, Scandinavian Airlines can have you in Chicago from London in 11h 25m. The distance from London to Chicago is about 3960 mi. This flight may include one or multiple stops.

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

    Currently priced at $390, Icelandair will fly you from London to Chicago and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Aer Lingus and United Airlines - these airlines can fly you to your destination from $446 and $485, respectively. Icelandair is currently priced 43% below the average price you’ll pay for this route.

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

    $527 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on SWISS and British Airways, with prices starting from $530 and $530, respectively.

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

    While some choose either London Heathrow - Chicago Midway or London Gatwick - Chicago O'Hare Intl, London Heathrow - Chicago O'Hare Intl is the most popular route from London to Chicago.

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

    Before booking your flight to Chicago from London, check out the most reliable airlines to get you to your destination on time: Air Canada (84%), Austrian Airlines (84%), United Airlines( 84%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally $1,663, our data shows the cheapest flight currently is $532. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $495 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Chicago 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 London to Chicago?

    Currently, March is the cheapest month in which you can book a flight from London to Chicago (average of $404). Flying from London to Chicago in July is currently the most expensive (average of $673). 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?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
Lansing
Hammond
Porter
Benton Harbor

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Alternative routes for London to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to O'Hare Intl flights
Heathrow to Midway flights
Gatwick to O'Hare Intl flights
London City to O'Hare Intl flights
Stansted to O'Hare Intl flights
Luton to O'Hare Intl flights
Manchester to O'Hare Intl flights
Heathrow to St. Louis flights
Edinburgh to O'Hare Intl flights
Gatwick to St. Louis flights
Birmingham to O'Hare Intl flights
Birmingham to Midway flights
Southampton to O'Hare Intl flights
Newcastle upon Tyne to O'Hare Intl flights
Leeds to O'Hare Intl flights
Edinburgh to St. Louis flights
Manchester to St. Louis flights
Birmingham to St. Louis flights
Bristol to O'Hare Intl flights
Liverpool to O'Hare Intl flights
Norwich to O'Hare Intl flights
Exeter to O'Hare Intl flights
Heathrow to Evansville flights
Newcastle upon Tyne to St. Louis flights
Gatwick to Evansville flights

Top 10 airlines flying from London to Chicago

Discover the top 10 airlines that operate flights from London to Chicago. 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$390Average$561FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$446Average$632FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$485Average$709FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$553Average$762FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$572Average$816FlexibilityNo cancel feeOn-time71%
IberiaCheapest$599Average$794FlexibilityNo cancel feeOn-time77%
FinnairCheapest$626Average$852FlexibilityNo cancel feeOn-time76%
Brussels AirlinesCheapest$633Average$832FlexibilityNo cancel feeOn-timeN/A

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