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St. Louis

$827+ Cheap flights from London (LON) to St. Louis (STL)

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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in March or January, booked 68 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from London to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to St. Louis (STL). 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 29, 2025.

Round-trip from

$858
(oojo)

One-way from

$827
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,170
From London (LON) to Lambert-St Louis
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One-way flight from London (LON) to Lambert-St Louis
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Highest demand for flights based on searches. 3% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from London to St. Louis

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

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.
Wed 8/276:40 amLHR - STL
2 stops21h 22mScandinavian Airlines
Wed 9/31:26 pmSTL - LHR
2 stops22h 14mScandinavian Airlines
Deal found 7/28$858
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/252:00 pmLGW - STL
2 stops25h 11mMultiple Airlines
Fri 9/51:57 pmSTL - LGW
1 stop14h 03mMultiple Airlines
Deal found 7/28$858
This Mytrip deal was found by Cheapflights users on 7/26. 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 9/2411:20 amLHR - STL
3 stops29h 30mMultiple Airlines
Sun 9/2812:05 pmSTL - LHR
3 stops28h 50mMultiple Airlines
Deal found 7/26$863
This lol.travel deal was found by Cheapflights users on 7/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/246:30 amLHR - STL
1 stop13h 00mLufthansa
Sun 9/2812:25 pmSTL - LHR
1 stop17h 20mLufthansa
Deal found 7/27$919
This lol.travel deal was found by Cheapflights users on 7/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/119:30 amLHR - STL
1 stop13h 10mUnited Airlines
Wed 9/241:30 pmSTL - LHR
1 stop11h 00mUnited Airlines
Deal found 7/27$928
This ChecknFly 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:10 pmLHR - STL
2 stops25h 42mFinnair
Wed 9/247:23 amSTL - LHR
1 stop17h 57mFinnair
Deal found 7/29$939
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/262:05 pmLHR - STL
1 stop11h 55mAir Canada
Tue 9/24:05 pmSTL - LHR
1 stop10h 30mAir Canada
Deal found 7/29$944
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 9/116:05 amLTN - STL
2 stops19h 52mMultiple Airlines
Thu 9/181:30 pmSTL - LTN
2 stops13h 45mMultiple Airlines
Deal found 7/28$987
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Thu 9/118:45 amLCY - STL
2 stops16h 14mLufthansa
Wed 9/247:04 pmSTL - LCY
2 stops17h 31mLufthansa
Deal found 7/27$1,028
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 9/115:05 pmLCY - STL
2 stops33h 10mBritish Airways
Thu 9/181:03 pmSTL - LCY
2 stops15h 37mBritish Airways
Deal found 7/28$1,049
This Mytrip deal was found by Cheapflights users on 7/26. 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 9/109:25 amLCY - STL
3 stops20h 28mMultiple Airlines
Wed 9/179:15 amSTL - LCY
2 stops25h 10mMultiple Airlines
Deal found 7/26$1,102
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2612:00 pmLGW - STL
2 stops16h 02mDelta
Tue 9/210:45 amSTL - LGW
2 stops17h 15mDelta
Deal found 7/29$1,158

Cheapflights Fare Finder

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

Fly from

London

Fly to

St. Louis

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 8/27

6:40 am-10:02 pm

2 stops21h 22m

Lambert-St Louis

Wed 9/3

1:26 pm-5:40 pm

2 stops22h 14m

$858

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 8/25

2:00 pm-9:11 am

2 stops25h 11m

Lambert-St Louis

Fri 9/5

1:57 pm-10:00 am

1 stop14h 03m

$858

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/24

11:20 am-10:50 am

3 stops29h 30m

Lambert-St Louis

Sun 9/28

12:05 pm-10:55 pm

3 stops28h 50m

$863

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/24

6:30 am-1:30 pm

1 stop13h 00m

Lambert-St Louis

Sun 9/28

12:25 pm-11:45 am

1 stop17h 20m

$919

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 9/11

9:30 am-4:40 pm

1 stop13h 10m

Lambert-St Louis

Wed 9/24

1:30 pm-6:30 am

1 stop11h 00m

$928

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/3

8:10 pm-3:52 pm

2 stops25h 42m

Lambert-St Louis

Wed 9/24

7:23 am-7:20 am

1 stop17h 57m

$939

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 8/26

2:05 pm-8:00 pm

1 stop11h 55m

Lambert-St Louis

Tue 9/2

4:05 pm-8:35 am

1 stop10h 30m

$944

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Thu 9/11

6:05 am-7:57 pm

2 stops19h 52m

Lambert-St Louis

Thu 9/18

1:30 pm-9:15 am

2 stops13h 45m

$987

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 9/11

8:45 am-6:59 pm

2 stops16h 14m

Lambert-St Louis

Wed 9/24

7:04 pm-6:35 pm

2 stops17h 31m

$1,028

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 9/11

5:05 pm-8:15 pm

2 stops33h 10m

Lambert-St Louis

Thu 9/18

1:03 pm-10:40 am

2 stops15h 37m

$1,049

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 41 results
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Best time to book a flight from London to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis 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 St. Louis

How far ahead should I book a flight from London to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from London to St. Louis. Price data was last updated on July 25, 2025.

Booking 68 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London to St. Louis?

Currently, August is the cheapest month in which you can book a flight from London to St. Louis (average of $311). Flying from London to St. Louis in March is currently the most expensive (average of $356). 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 STL?

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

A simple way to save on the total cost of your ticket is to fly from London to St. Louis at noon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the morning.

How much does it cost to fly round-trip from London to St. Louis?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Delta, Finnair, and United Airlines from London to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

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
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

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
7,977 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

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.
United Airlines
7.4
Good
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

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.
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

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.
Turkish Airlines
7.3
Good
3,925 reviews
Delta
8.0
Very good
7,977 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

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 St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from London?

    If you book a flight to St. Louis from London, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from London to Lambert-St Louis per day from 3 different airlines.

  • What are the cheapest airlines flying from London to St. Louis round-trip?

    Our cheapest airline available from London to St. Louis is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $858 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at $919 and $928 round-trip. Scandinavian Airlines is currently priced 12% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London to St. Louis one-way?

    $881 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Aer Lingus and Finnair, with prices starting from $898 and $1,017, respectively.

  • What are the most popular routes from London to St. Louis?

    While some choose either London Gatwick - Lambert-St Louis or London City - Lambert-St Louis, London Heathrow - Lambert-St Louis is the most popular route from London to St. Louis.

  • Can I find deals for flights from London to St. Louis that include hotel bookings?

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

  • How can I find direct flights from London to St. Louis?

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

  • Can I find deals for business class flights from London to St. Louis?

    Yes. Cheapflights offers flight deals from London to St. Louis 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 St. Louis?

    Currently, August is the cheapest month in which you can book a flight from London to St. Louis (average of $311). Flying from London to St. Louis in March is currently the most expensive (average of $356). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

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Top 3 airlines flying from London to St. Louis

Discover the top 3 airlines that operate flights from London to St. Louis. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$1,083FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$925Average$925FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$952Average$1,220FlexibilityNo cancel feeOn-time69%

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