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$554+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheapflights Tip: The best prices from London to Chicago are usually found in February or March, booked 64 days in advance, depart on a Wednesday or Friday and return on a Wednesday

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 July 30, 2025.

Round-trip from

$574
(Booking.com)

One-way from

$554
(Justfly.com)

Popular in

July

Cheapest in

February

Average price

$885

Good round-trip deal

$749 or less

Good one-way deal

$714 or less
From London (LON) to Chicago (CHI)
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One-way flight from London (LON) to Chicago (CHI)
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Highest demand for flights based on searches. 14% potential increase in price ($120 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from London (LON) to Chicago (CHI).
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Price to beat on a one-way flight from London (LON) to Chicago (CHI).
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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 July 30, 2025.

This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/302:30 pmLGW - ORD
2 stops31h 40mMultiple Airlines
Wed 10/16:44 pmORD - LGW
2 stops29h 36mMultiple Airlines
Deal found 7/29$574
This TravelUp deal was found by Cheapflights users on 7/29. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:25 amLCY - ORD
1 stop12h 55mSWISS
Fri 11/144:10 pmORD - LCY
1 stop13h 30mSWISS
Deal found 7/29$574
This Icelandair deal was found by Cheapflights users on 7/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:05 pmLHR - ORD
1 stop14h 10mIcelandair
Wed 9/177:25 pmORD - LHR
1 stop10h 30mIcelandair
Deal found 7/29$574
This Mytrip deal was found by Cheapflights users on 7/28. 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 9/1112:35 pmLTN - ORD
1 stop12h 25mMultiple Airlines
Thu 9/183:45 pmORD - LTN
1 stop13h 20mMultiple Airlines
Deal found 7/28$574
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:15 amLHR - ORD
1 stop18h 35mBritish Airways
Mon 10/131:59 pmORD - LHR
1 stop14h 06mBritish Airways
Deal found 7/28$577
This The Travel House deal was found by Cheapflights users on 7/29. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/163:40 pmLGW - ORD
1 stop32h 35mIcelandair
Sat 9/207:25 pmORD - LGW
1 stop13h 15mIcelandair
Deal found 7/29$579
This Mytrip deal was found by Cheapflights users on 7/28. 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 9/116:55 amSTN - ORD
2 stops20h 20mMultiple Airlines
Thu 9/187:25 pmORD - STN
2 stops14h 20mMultiple Airlines
Deal found 7/28$580
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/118:40 amLHR - ORD
1 stop13h 15mUnited Airlines
Wed 9/244:00 pmORD - LHR
Nonstop8h 20mUnited Airlines
Deal found 7/29$581
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sat 9/132:00 pmLGW - MDW
1 stop25h 18mMultiple Airlines
Sat 9/2010:51 amMDW - LGW
1 stop17h 09mMultiple Airlines
Deal found 7/30$582
This ChecknFly deal was found by Cheapflights users on 7/30. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/99:15 amLHR - ORD
1 stop14h 21mFinnair
Mon 10/136:58 amORD - LHR
2 stops17h 22mFinnair
Deal found 7/30$582
This TravelUp deal was found by Cheapflights users on 7/29. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:45 amLCY - ORD
1 stop17h 10mMultiple Airlines
Tue 10/147:05 pmORD - LCY
1 stop11h 25mMultiple Airlines
Deal found 7/29$583
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/63:05 pmLGW - ORD
1 stop24h 22mBritish Airways
Mon 10/137:00 pmORD - LGW
1 stop29h 35mBritish Airways
Deal found 7/29$584

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 July 30, 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 - ORD

LGWORD

London Gatwick

Tue 9/30

2:30 pm-4:10 pm

2 stops31h 40m

Chicago O'Hare Intl

Wed 10/1

6:44 pm-6:20 am

2 stops29h 36m

$574

LondonChicago

LCY - ORD

LCYORD

London City

Fri 11/7

9:25 am-4:20 pm

1 stop12h 55m

Chicago O'Hare Intl

Fri 11/14

4:10 pm-11:40 am

1 stop13h 30m

$574

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/10

1:05 pm-6:15 pm

1 stop11h 10m

Chicago O'Hare Intl

Fri 9/19

7:25 pm-11:55 am

1 stop10h 30m

$574

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 9/11

12:35 pm-7:00 pm

1 stop12h 25m

Chicago O'Hare Intl

Thu 9/18

3:45 pm-11:05 am

1 stop13h 20m

$574

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

6:15 am-6:50 pm

1 stop18h 35m

Chicago O'Hare Intl

Tue 10/14

12:52 pm-7:40 am

1 stop12h 48m

$577

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 9/16

3:40 pm-6:15 pm

1 stop32h 35m

Chicago O'Hare Intl

Sat 9/20

7:25 pm-2:40 pm

1 stop13h 15m

$579

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 9/11

6:55 am-9:15 pm

2 stops20h 20m

Chicago O'Hare Intl

Thu 9/18

7:25 pm-3:45 pm

2 stops14h 20m

$580

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/11

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Wed 9/24

4:00 pm-6:20 am

Nonstop8h 20m

$581

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/9

11:00 am-7:11 pm

1 stop14h 11m

Chicago O'Hare Intl

Mon 10/13

10:20 pm-6:20 am

2 stops26h 00m

$582

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Sat 9/13

2:00 pm-9:18 am

1 stop25h 18m

Chicago Midway

Sat 9/20

10:51 am-10:00 am

1 stop17h 09m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 53 results
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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 July 25, 2025.

The best time to book flights from London to Chicago is 64 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, August is the cheapest month in which you can book a flight from London to Chicago (average of $245). Flying from London to Chicago in March is currently the most expensive (average of $321). 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 July 30, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 32% 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 July 30, 2025.

The most flights from LON to CHI are scheduled on a Monday (53 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (47 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 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 July 30, 2025.
See what other customers who have flown with Delta, KLM, and Austrian 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.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

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

    Currently priced at $574, SWISS will fly you from London to Chicago and back. In addition to SWISS, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and British Airways - these airlines can fly you to your destination from $574 and $577, respectively. SWISS is currently priced 18% below the average price you’ll pay for this route.

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

    $554 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 Icelandair and TAP AIR PORTUGAL, with prices starting from $557 and $559, 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: 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 $1,520, our data shows the cheapest flight currently is $607. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $483 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, August is the cheapest month in which you can book a flight from London to Chicago (average of $245). Flying from London to Chicago in March is currently the most expensive (average of $321). 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
Benton Harbor
Porter
Valparaiso
Chesterton

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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
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
Birmingham to St. Louis flights
Gatwick to St. Louis flights
Birmingham to O'Hare Intl flights
Southampton to O'Hare Intl flights
Leeds to O'Hare Intl flights
Newcastle upon Tyne to O'Hare Intl flights
Birmingham to Midway flights
Edinburgh to St. Louis flights
Manchester to St. Louis flights
Liverpool to O'Hare Intl flights
Heathrow to Evansville flights
Bristol to O'Hare Intl flights
Gatwick to Evansville flights
Norwich to O'Hare Intl flights
Exeter to O'Hare Intl 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$390Average$562FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$569FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$485Average$752FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$552Average$784FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$568Average$736FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$793FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$583Average$792FlexibilityNo cancel feeOn-time71%
Austrian AirlinesCheapest$586Average$967FlexibilityNo cancel feeOn-time78%
FinnairCheapest$607Average$838FlexibilityNo cancel feeOn-time76%

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