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St. Louis

$268+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 13 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$673
(Kiwi.com)

One-way from

$268
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$739
Provider with most accurate pricing for London (LON)-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Lambert-St Louis flights.
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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. 5% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/192:00 pmLGW - STL
1 stop15h 46mMultiple Airlines
Sun 4/275:41 pmSTL - LGW
1 stop34h 19mMultiple Airlines
Deal found 3/27$673
This Mytrip deal was found by Cheapflights users on 3/27. 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 4/241:05 pmLHR - STL
3 stops28h 40mMultiple Airlines
Thu 5/11:00 pmSTL - LHR
3 stops16h 55mMultiple Airlines
Deal found 3/27$725
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2411:05 amLHR - STL
2 stops28h 51mUnited Airlines
Thu 5/16:30 amSTL - LHR
1 stop19h 50mUnited Airlines
Deal found 3/27$784
This The Travel House deal was found by Cheapflights users on 3/26. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/212:25 pmLHR - STL
1 stop15h 08mIberia
Fri 4/252:03 pmSTL - LHR
1 stop12h 02mIberia
Deal found 3/26$905
This Netflights deal was found by Cheapflights users on 3/27. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/812:30 pmLHR - STL
1 stop14h 28mBritish Airways
Sun 5/117:30 pmSTL - LHR
1 stop10h 45mBritish Airways
Deal found 3/27$940
This Lufthansa deal was found by Cheapflights users on 3/26. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/26:30 amLHR - STL
1 stop13h 00mLufthansa
Sat 5/1711:49 amSTL - LHR
1 stop13h 26mLufthansa
Deal found 3/26$957
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/288:30 amLHR - STL
1 stop12h 19mAir Canada
Mon 5/121:30 pmSTL - LHR
1 stop14h 30mAir Canada
Deal found 3/26$976
This Mytrip deal was found by Cheapflights users on 3/27. 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 5/89:25 amLCY - STL
2 stops16h 18mMultiple Airlines
Sun 5/116:30 amSTL - LCY
3 stops27h 55mMultiple Airlines
Deal found 3/27$985
This Mytrip deal was found by Cheapflights users on 3/26. 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.
Thu 5/89:10 pmLTN - STL
2 stops28h 33mMultiple Airlines
Sun 5/1110:10 amSTL - LTN
3 stops30h 45mMultiple Airlines
Deal found 3/26$988
This Delta deal was found by Cheapflights users on 3/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/286:30 amLHR - STL
2 stops17h 26mDelta
Mon 5/121:09 pmSTL - LHR
2 stops14h 51mDelta
Deal found 3/26$997
This Scandinavian Airlines deal was found by Cheapflights users on 3/27. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:40 amLHR - STL
2 stops22h 59mScandinavian Airlines
Tue 10/213:30 pmSTL - LHR
2 stops21h 00mScandinavian Airlines
Deal found 3/27$1,035
This Mytrip deal was found by Cheapflights users on 3/27. 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 4/247:30 amSTN - STL
3 stops20h 42mMultiple Airlines
Thu 5/16:10 pmSTL - STN
3 stops34h 30mMultiple Airlines
Deal found 3/27$1,037

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 March 28, 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

Sat 4/19

2:00 pm-11:46 pm

1 stop15h 46m

Lambert-St Louis

Sun 4/27

5:41 pm-10:00 am

1 stop34h 19m

$673

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 4/24

1:05 pm-11:45 am

3 stops28h 40m

Lambert-St Louis

Thu 5/1

1:00 pm-11:55 am

3 stops16h 55m

$725

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 4/24

11:05 am-9:56 am

2 stops28h 51m

Lambert-St Louis

Thu 5/1

6:30 am-8:20 am

1 stop19h 50m

$784

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 4/21

2:25 pm-11:33 pm

1 stop15h 08m

Lambert-St Louis

Fri 4/25

2:03 pm-8:05 am

1 stop12h 02m

$905

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 5/8

12:30 pm-8:58 pm

1 stop14h 28m

Lambert-St Louis

Sun 5/11

7:30 pm-12:15 pm

1 stop10h 45m

$940

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 5/2

6:30 am-1:30 pm

1 stop13h 00m

Lambert-St Louis

Sat 5/17

11:49 am-7:15 am

1 stop13h 26m

$957

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 4/28

8:30 am-2:49 pm

1 stop12h 19m

Lambert-St Louis

Mon 5/12

1:30 pm-10:00 am

1 stop14h 30m

$976

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 5/8

9:25 am-7:43 pm

2 stops16h 18m

Lambert-St Louis

Sun 5/11

6:30 am-4:25 pm

3 stops27h 55m

$985

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Thu 5/8

9:10 pm-7:43 pm

2 stops28h 33m

Lambert-St Louis

Sun 5/11

10:10 am-10:55 pm

3 stops30h 45m

$988

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 4/28

6:30 am-5:56 pm

2 stops17h 26m

Lambert-St Louis

Mon 5/12

1:09 pm-10:00 am

2 stops14h 51m

$997

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 42 results
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Compare providers for flights from London to St. Louis

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 St. Louis in March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 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-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-St. Louis 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-St. Louis 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 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 March 21, 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 March 28, 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 March 28, 2025.
See what other customers who have flown with Delta, Finnair and Austrian Airlines 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
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Turkish Airlines
7.3
Good
3,744 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 United Airlines. Our recent data shows that you can find tickets from as low as $784 on this airline. Additional options worth looking into are Iberia and British Airways, starting at $905 and $940 round-trip. United Airlines is currently priced 15% below the average price you’ll pay for this route.

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

    $838 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Lufthansa and Aer Lingus, with prices starting from $878 and $971, 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$278Average$1,357FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$867Average$1,263FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$925Average$928FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$961Average$1,164FlexibilityNo cancel feeOn-time70%
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