HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$526+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 February or September, booked 46 days in advance, depart on a Wednesday or Friday 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 December 18, 2025.

This Booking.com deal was found by Cheapflights users on 12/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:50 amLHR - ORD
1 stop12h 10mAer Lingus
Sun 3/224:50 pmORD - LHR
1 stop12h 20mAer Lingus
Deal found 12/17$625
This oojo deal was found by Cheapflights users on 12/17. 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 12/247:50 pmLHR - ORD
2 stops26h 55mScandinavian Airlines
Sun 3/228:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 12/17$671
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:15 amLHR - ORD
1 stop14h 40mAmerican Airlines
Sun 3/2210:45 pmORD - LHR
Nonstop7h 50mAmerican Airlines
Deal found 12/17$673
This oojo deal was found by Cheapflights users on 12/17. 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.
Tue 12/235:25 pmLHR - ORD
1 stop27h 30mIberia
Thu 1/156:25 pmORD - LHR
Nonstop7h 50mIberia
Deal found 12/17$675
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 12/252:10 pmLHR - ORD
Nonstop8h 50mBritish Airways
Thu 1/159:00 pmORD - LHR
1 stop11h 25mBritish Airways
Deal found 12/17$677
This Orbitz deal was found by Cheapflights users on 12/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:10 pmLHR - ORD
Nonstop8h 50mBritish Airways
Sun 3/227:45 pmORD - LHR
Nonstop7h 50mBritish Airways
Deal found 12/17$680
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Thu 1/227:20 pmORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 12/16$715
This FlightHub deal was found by Cheapflights users on 12/17. 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 12/256:30 pmLHR - ORD
1 stop26h 55mTAP AIR PORTUGAL
Wed 12/317:10 pmORD - LHR
1 stop16h 20mTAP AIR PORTUGAL
Deal found 12/17$720
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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.
Sun 12/2811:55 amLGW - ORD
1 stop11h 25mIcelandair
Mon 1/126:30 pmORD - LGW
1 stop10h 25mIcelandair
Deal found 12/17$738
This Trip.com deal was found by Cheapflights users on 12/17. 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.
Thu 12/257:40 pmLGW - ORD
1 stop25h 15mIberia
Thu 1/155:40 pmORD - LGW
1 stop19h 20mIberia
Deal found 12/17$739
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/16. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:00 pmLGW - ORD
1 stop29h 25mTAP AIR PORTUGAL
Wed 12/317:10 pmORD - LGW
1 stop13h 55mTAP AIR PORTUGAL
Deal found 12/16$762
This British Airways deal was found by Cheapflights users on 12/17. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:50 amLCY - ORD
1 stop13h 10mBritish Airways
Sun 3/228:40 pmORD - LCY
1 stop11h 00mBritish Airways
Deal found 12/17$778

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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$601
(Mytrip)

One-way from

$526
(Lufthansa)

Popular in

July

Cheapest in

February

Average price

$799

Good round-trip deal

$731 or less

Good one-way deal

$633 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 ($108 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 18, 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

STN - ORD

STNORD

London Stansted

Fri 1/30

1:50 pm-5:20 pm

2 stops33h 30m

Chicago O'Hare Intl

Fri 2/6

6:30 pm-9:35 pm

2 stops21h 05m

$601

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Mon 1/12

2:00 pm-11:09 pm

1 stop15h 09m

Chicago Midway

Fri 2/6

1:00 pm-10:00 am

1 stop15h 00m

$610

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/19

10:15 am-4:46 pm

1 stop12h 31m

Chicago O'Hare Intl

Mon 1/26

1:25 pm-12:00 pm

2 stops16h 35m

$612

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 4/17

3:40 pm-9:40 pm

1 stop12h 00m

Chicago O'Hare Intl

Tue 4/21

7:25 pm-2:40 pm

1 stop13h 15m

$613

LondonChicago

LCY - ORD

LCYORD

London City

Fri 1/30

6:50 am-7:15 pm

1 stop18h 25m

Chicago O'Hare Intl

Mon 2/2

9:00 pm-6:35 pm

1 stop15h 35m

$613

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 4/17

12:00 pm-7:00 pm

1 stop13h 00m

Chicago O'Hare Intl

Tue 4/21

7:05 pm-9:05 am

Nonstop8h 00m

$617

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 2/27

12:20 pm-10:54 pm

1 stop16h 34m

Chicago O'Hare Intl

Tue 3/10

6:04 am-9:40 pm

1 stop10h 36m

$620

LondonChicago

STN - ORD

STNORD

London Stansted

Sat 1/31

7:15 am-4:45 pm

1 stop15h 30m

Chicago O'Hare Intl

Sat 2/7

7:20 pm-1:05 pm

1 stop11h 45m

$622

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/4

7:05 am-4:45 pm

2 stops15h 40m

Chicago O'Hare Intl

Tue 3/10

7:00 am-9:20 am

2 stops21h 20m

$629

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/20

10:20 am-5:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Wed 4/22

7:15 pm-9:40 pm

1 stop20h 25m

$631

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results
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 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
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 December 12, 2025.

The best time to book flights from London to Chicago is 46 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, December is the cheapest month in which you can book a flight from London to Chicago (average of $318). Flying from London to Chicago in July is currently the most expensive (average of $670). 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 December 18, 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.

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 December 18, 2025.

The most flights from LON to CHI are scheduled on a Wednesday (51 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (35 on average).

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 64% 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 08m.

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 02m.

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 172 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?

Saturday 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 December 18, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Icelandair 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
9,091 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
7.2
Good
11,053 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
591 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

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.
Iberia
7.0
Good
3,050 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

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
7,583 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Crew

8.1

Boarding

7.7

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 $613, British Airways can have you in Chicago from London in 12h. 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 $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 Icelandair and United Airlines - these airlines can fly you to your destination from $451 and $485, respectively. Aer Lingus is currently priced 35% below the average price you’ll pay for this route.

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

    $288 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on TAP AIR PORTUGAL and Aer Lingus, with prices starting from $400 and $467, respectively.

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

    While some choose either London Gatwick - Chicago O'Hare Intl or London City - 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: Austrian Airlines (88%), Brussels Airlines (88%), Lufthansa( 88%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally $1,445, our data shows the cheapest flight currently is $513. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $461 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, December is the cheapest month in which you can book a flight from London to Chicago (average of $318). Flying from London to Chicago in July is currently the most expensive (average of $670). 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
Lansing
Merrillville
Hammond
Porter
Benton Harbor

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.

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
Gatwick to O'Hare Intl flights
London City to O'Hare Intl flights
Heathrow to Midway flights
Stansted to O'Hare Intl flights
Luton to O'Hare Intl flights
Manchester to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Heathrow to St. Louis flights
Gatwick to St. Louis flights
Birmingham to O'Hare Intl flights
Birmingham to Midway flights
Newcastle upon Tyne to O'Hare Intl flights
Manchester to St. Louis flights
Leeds to O'Hare Intl flights
Southampton to O'Hare Intl flights
Heathrow to Evansville flights
Edinburgh to St. Louis flights
Bristol to O'Hare Intl flights
Exeter to O'Hare Intl flights
Liverpool to O'Hare Intl flights
Norwich to O'Hare Intl flights
Birmingham to St. Louis flights
Newcastle upon Tyne to St. Louis flights
Gatwick to Evansville flights
Liverpool to St. Louis flights
Leeds to St. Louis 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$650FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$451Average$543FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$485Average$632FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$554Average$774FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$558Average$793FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$572Average$798FlexibilityNo cancel feeOn-time71%
FinnairCheapest$625Average$808FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$720Average$830FlexibilityNo cancel feeOn-time76%

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.
Site
Cookie settings©2025 Cheapflights