HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$498+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from London to Chicago are usually found in September or February, booked 35 days in advance, depart on a Friday or Wednesday and return on a Tuesday

Cheap 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 April 17, 2026.

This FlightHub deal was found by Cheapflights users on 4/13. 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 9/163:40 pm
LGW
-
ORD
1 stop11h 45m
Icelandair
Wed 10/147:25 pm
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 4/13$671
This Gotogate deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:25 pm
LHR
-
ORD
1 stop26h 50m
Icelandair
Tue 5/1910:25 pm
ORD
-
LHR
1 stop31h 30m
Icelandair
Deal found 4/12$676
This Mytrip deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:30 am
STN
-
ORD
2 stops17h 45m
Multiple Airlines
Tue 4/287:25 pm
ORD
-
STN
2 stops16h 10m
Multiple Airlines
Deal found 4/12$676
This Mytrip deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/219:40 am
LGW
-
ORD
2 stops14h 35m
Multiple Airlines
Tue 4/287:25 pm
ORD
-
LGW
2 stops19h 50m
Multiple Airlines
Deal found 4/12$677
This deal was found by Cheapflights users on 4/15. 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.
Thu 11/51:35 pm
LHR
-
ORD
Nonstop9h 25m
United Airlines
Sat 11/149:15 pm
ORD
-
LHR
Nonstop8h 00m
United Airlines
Deal found 4/15$678
This Mytrip deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:30 am
STN
-
ORD
2 stops17h 45m
Multiple Airlines
Tue 4/287:25 pm
ORD
-
STN
2 stops18h 10m
Multiple Airlines
Deal found 4/12$679
This oojo deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/103:40 pm
LGW
-
ORD
1 stop32h 35m
Icelandair
Mon 5/187:25 pm
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 4/12$680
This deal was found by Cheapflights users on 4/15. 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.
Wed 7/18:40 am
LHR
-
ORD
1 stop16h 45m
JetBlue
Wed 7/2910:56 am
ORD
-
LHR
1 stop13h 34m
JetBlue
Deal found 4/15$680
This deal was found by Cheapflights users on 4/16. 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.
Thu 9/173:20 pm
LHR
-
ORD
1 stop12h 46m
United Airlines
Sun 10/116:35 pm
ORD
-
LHR
Nonstop8h 25m
United Airlines
Deal found 4/16$682
This Mytrip deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:05 am
LGW
-
ORD
2 stops13h 10m
Multiple Airlines
Tue 4/287:25 pm
ORD
-
LGW
2 stops19h 50m
Multiple Airlines
Deal found 4/12$683
This Mytrip deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/219:40 am
LTN
-
ORD
2 stops14h 35m
Multiple Airlines
Tue 4/287:25 pm
ORD
-
LTN
2 stops14h 05m
Multiple Airlines
Deal found 4/12$683
This Trip.com deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/121:00 pm
LGW
-
ORD
1 stop11h 15m
Icelandair
Tue 5/1910:25 pm
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 4/12$684

Find 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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$671
(FlightHub)

One-way from

$498
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$729

Good round-trip deal

$900 or less

Good one-way deal

$690 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. 11% potential increase in price ($94 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 April 2026
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 April 17, 2026.
Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 9/11

3:40 pm-9:25 pm

1 stop11h 45m

Chicago O'Hare Intl

Mon 9/21

7:25 pm-2:40 pm

1 stop13h 15m

$737

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 4/27

12:25 pm-7:15 pm

1 stop12h 50m

Chicago O'Hare Intl

Mon 5/11

3:45 pm-12:45 pm

1 stop15h 00m

$741

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 5/28

7:30 pm-6:15 pm

2 stops28h 45m

Chicago O'Hare Intl

Tue 6/2

10:25 pm-10:25 pm

2 stops18h 00m

$768

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 10/9

8:30 am-9:25 pm

2 stops18h 55m

Chicago O'Hare Intl

Sun 10/11

3:45 pm-8:10 pm

3 stops22h 25m

$768

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 5/18

9:15 am-9:25 pm

2 stops18h 10m

Chicago O'Hare Intl

Mon 5/25

7:25 pm-9:05 pm

2 stops19h 40m

$772

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/9

6:50 am-12:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Wed 9/23

5:00 am-9:25 pm

1 stop10h 25m

$806

LondonChicago

LTN - ORD

LTNORD

London Luton

Sat 6/13

9:50 pm-11:50 am

1 stop20h 00m

Chicago O'Hare Intl

Tue 6/16

9:55 am-3:30 pm

3 stops23h 35m

$815

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 9/7

9:25 am-3:55 pm

1 stop12h 30m

Chicago O'Hare Intl

Sat 9/26

2:30 pm-8:25 am

1 stop11h 55m

$840

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 5/4

9:05 am-1:20 pm

1 stop34h 15m

Chicago O'Hare Intl

Wed 5/13

9:40 pm-11:55 am

Nonstop8h 15m

$856
Quickest round-trip

LondonChicago

LCY - ORD

LCYORD

London City

Mon 9/21

10:00 am-2:30 pm

1 stop10h 30m

Chicago O'Hare Intl

Mon 9/28

4:50 pm-8:50 am

1 stop10h 00m

$876

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy1 starTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 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 London-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Chicago flight deals on Cheapflights vs. FlightHub >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 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 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 April 10, 2026.

The best time to book flights from London to Chicago is 35 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, September is the cheapest month in which you can book a flight from London to Chicago (average of $560). Flying from London to Chicago in January is currently the most expensive (average of $1,637). 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 April 17, 2026.

When flying from London to Chicago, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Chicago

Explore weekly flight availability from London to Chicago. 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 17, 2026.

The most flights from LON to CHI are scheduled on a Thursday (46 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).

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

How often are flights from London to Chicago delayed?

About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 176 minutes.

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

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

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

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

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

Over the last year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

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 April 17, 2026.
See what other customers who have flown with United Airlines,American Airlines, andIcelandair 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.
United Airlines
7.4
Good
9,605 reviews

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,605 reviews
United Airlines
7.4
Good
9,605 reviews

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
American Airlines
7.1
Good
11,603 reviews
United Airlines
7.4
Good
9,605 reviews

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Icelandair
7.0
Good
634 reviews
United Airlines
7.4
Good
9,605 reviews

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Lufthansa
6.8
Okay
7,930 reviews
United Airlines
7.4
Good
9,605 reviews

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
British Airways
6.7
Okay
7,893 reviews
United Airlines
7.4
Good
9,605 reviews

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

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 $806, Icelandair can have you in Chicago from London in 11h 10m. The distance from London to Chicago is about 3939 mi. This flight may include one or multiple stops.

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

    Currently priced at $446, Aer Lingus will fly you from London to Chicago and back. In addition to Aer Lingus, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Icelandair - these airlines can fly you to your destination from $485 and $494, respectively. Aer Lingus is currently priced 36% below the average price you’ll pay for this route.

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

    $455 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $500 and $508, respectively.

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

    While some choose either London Gatwick - Chicago O'Hare Intl or London Stansted - 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 (87%), United Airlines (87%), Brussels Airlines( 87%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally $1,890, our data shows the cheapest flight currently is $568. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $585 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, September is the cheapest month in which you can book a flight from London to Chicago (average of $560). Flying from London to Chicago in January is currently the most expensive (average of $1,637). 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
Benton Harbor
Lansing
Merrillville
Hammond
Porter

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 9 airlines flying from London to Chicago

Discover the top 9 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 April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$672FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$485Average$847FlexibilityNo cancel feeOn-time69%
IcelandairCheapest$494Average$588FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$530Average$931FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$559Average$784FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$583Average$873FlexibilityNo cancel feeOn-time71%
IberiaCheapest$599Average$918FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$618Average$838FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$653Average$789FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.