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St. Louis

$406+ 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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 80 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 June 12, 2025.

Round-trip from

$833
(Kiwi.com)

One-way from

$406
(Mytrip)

Popular in

December

Cheapest in

March

Average price

$924
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 ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Wed 7/92:00 pmLGW - STL
1 stop15h 47mMultiple Airlines
Wed 7/1611:24 amSTL - LGW
1 stop16h 36mMultiple Airlines
Deal found 6/11$833
This Scandinavian Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:40 amLHR - STL
3 stops22h 59mScandinavian Airlines
Sat 10/113:30 pmSTL - LHR
2 stops20h 10mScandinavian Airlines
Deal found 6/11$872
This ChecknFly deal was found by Cheapflights users on 6/11. 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 10/291:35 pmLHR - STL
1 stop14h 12mLufthansa
Sat 11/111:45 amSTL - LHR
2 stops19h 05mLufthansa
Deal found 6/11$890
This Mytrip deal was found by Cheapflights users on 6/11. 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 7/93:05 pmLHR - STL
3 stops24h 47mMultiple Airlines
Wed 7/1611:24 amSTL - LHR
3 stops26h 56mMultiple Airlines
Deal found 6/11$906
This Mytrip deal was found by Cheapflights users on 6/11. 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 10/79:50 pmLTN - STL
2 stops27h 48mMultiple Airlines
Tue 10/214:05 pmSTL - LTN
2 stops14h 30mMultiple Airlines
Deal found 6/11$910
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Sat 9/133:10 pmLHR - STL
1 stop13h 40mBritish Airways
Sat 9/2712:28 pmSTL - LHR
1 stop11h 57mBritish Airways
Deal found 6/10$956
This ChecknFly deal was found by Cheapflights users on 6/12. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:15 amLHR - STL
1 stop14h 02mFinnair
Sat 11/291:55 pmSTL - LHR
1 stop14h 05mFinnair
Deal found 6/12$958
This Delta deal was found by Cheapflights users on 6/11. 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.
Fri 9/126:30 amLHR - STL
2 stops15h 28mDelta
Sat 9/207:20 amSTL - LHR
1 stop17h 55mDelta
Deal found 6/11$989
This Netflights deal was found by Cheapflights users on 6/11. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/159:00 amLHR - STL
2 stops15h 02mVirgin Atlantic
Fri 11/2110:45 amSTL - LHR
2 stops14h 55mVirgin Atlantic
Deal found 6/11$1,001
This Mytrip deal was found by Cheapflights users on 6/10. 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 6/196:55 amSTN - STL
3 stops35h 41mMultiple Airlines
Wed 7/24:00 pmSTL - STN
2 stops18h 20mMultiple Airlines
Deal found 6/10$1,016
This Mytrip deal was found by Cheapflights users on 6/10. 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 8/275:40 pmLHR - STL
2 stops32h 05mAir Canada
Sun 8/314:00 pmSTL - LHR
2 stops23h 00mAir Canada
Deal found 6/10$1,030
This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 6/1912:00 pmLGW - STL
2 stops17h 51mDelta
Wed 7/210:48 amSTL - LGW
2 stops17h 12mDelta
Deal found 6/11$1,048

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 June 12, 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

LGW - STL

LGWSTL

London Gatwick

Wed 7/9

2:00 pm-11:47 pm

1 stop15h 47m

Lambert-St Louis

Wed 7/16

11:24 am-10:00 am

1 stop16h 36m

$833

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/3

6:40 am-11:39 pm

3 stops22h 59m

Lambert-St Louis

Sat 10/11

3:30 pm-5:40 pm

2 stops20h 10m

$872

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 10/29

1:35 pm-10:47 pm

1 stop14h 12m

Lambert-St Louis

Sat 11/1

11:45 am-11:50 am

2 stops19h 05m

$890

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 7/9

3:05 pm-9:52 am

3 stops24h 47m

Lambert-St Louis

Wed 7/16

11:24 am-8:20 pm

3 stops26h 56m

$906

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Tue 10/7

9:50 pm-7:38 pm

2 stops27h 48m

Lambert-St Louis

Tue 10/21

4:05 pm-12:35 pm

2 stops14h 30m

$910

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 9/13

3:10 pm-10:50 pm

1 stop13h 40m

Lambert-St Louis

Sat 9/27

12:28 pm-6:25 am

1 stop11h 57m

$956

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 11/15

10:15 am-6:17 pm

1 stop14h 02m

Lambert-St Louis

Sat 11/29

1:55 pm-10:00 am

1 stop14h 05m

$958

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 9/12

6:30 am-3:58 pm

2 stops15h 28m

Lambert-St Louis

Sat 9/20

7:20 am-7:15 am

1 stop17h 55m

$989

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 11/15

9:00 am-6:02 pm

2 stops15h 02m

Lambert-St Louis

Fri 11/21

10:45 am-7:40 am

2 stops14h 55m

$1,001

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 8/27

5:40 pm-7:45 pm

2 stops32h 05m

Lambert-St Louis

Sun 8/31

4:00 pm-9:00 pm

2 stops23h 00m

$1,030

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 45 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 June 9, 2025.

Booking 13 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 June 12, 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 June 12, 2025.
See what other customers who have flown with Delta, KLM and Finnair from London to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 4 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 $872 on this airline. Additional options worth looking into are Lufthansa and British Airways, starting at $890 and $956 round-trip. Scandinavian Airlines is currently priced 8% below the average price you’ll pay for this route.

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

    $955 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 Finnair and Virgin Atlantic, with prices starting from $970 and $1,249, 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 London?

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Top 4 airlines flying from London to St. Louis

Discover the top 4 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$278Average$1,338FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$555Average$1,124FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$925Average$928FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$952Average$1,263FlexibilityNo cancel feeOn-time69%

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