HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$348+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Jan 28 — Feb 41
Tue 1/28
Tue 2/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to St. Louis 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.

The best prices from London to Lambert-St Louis are usually found in January or March, 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 January 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$709
(The Travel House)

One-way from

$348
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$740
Provider with most accurate pricing for London (LON)-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Lambert-St Louis flights.
Search Deals
From London (LON) to Lambert-St Louis
Search Deals
One-way flight from London (LON) to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2025
Search Deals

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 January 23, 2025.

This The Travel House deal was found by Cheapflights users on 1/23. 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 2/1111:45 amLHR - STL
1 stop16h 32mFinnair
Fri 2/1411:04 amSTL - LHR
1 stop15h 11mFinnair
Deal found 1/23$709
This Kiwi.com deal was found by Cheapflights users on 1/22. 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.
Thu 2/1312:00 pmLGW - STL
1 stop16h 08mMultiple Airlines
Wed 2/267:04 pmSTL - LGW
2 stops33h 31mMultiple Airlines
Deal found 1/22$731
This Mytrip deal was found by Cheapflights users on 1/23. 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.
Mon 3/39:15 amLCY - STL
3 stops32h 15mMultiple Airlines
Mon 3/1012:15 pmSTL - LCY
3 stops23h 50mMultiple Airlines
Deal found 1/23$757
This Mytrip deal was found by Cheapflights users on 1/23. 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.
Mon 3/108:20 amSTN - STL
3 stops35h 46mMultiple Airlines
Mon 3/173:50 pmSTL - STN
3 stops23h 25mMultiple Airlines
Deal found 1/23$760
This Netflights deal was found by Cheapflights users on 1/21. 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 3/1310:15 amLHR - STL
1 stop15h 26mBritish Airways
Thu 3/2711:39 amSTL - LHR
1 stop13h 41mBritish Airways
Deal found 1/21$816
This Air Canada deal was found by Cheapflights users on 1/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/510:30 amLHR - STL
2 stops15h 31mMultiple Airlines
Mon 5/121:30 pmSTL - LHR
1 stop14h 30mMultiple Airlines
Deal found 1/22$883
This TravelUp deal was found by Cheapflights users on 1/22. 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.
Mon 3/106:30 amLHR - STL
2 stops22h 02mLufthansa
Mon 3/1712:05 pmSTL - LHR
1 stop27h 30mLufthansa
Deal found 1/22$888
This United Airlines deal was found by Cheapflights users on 1/22. 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.
Wed 2/196:30 amLHR - STL
2 stops18h 45mUnited Airlines
Wed 2/261:03 pmSTL - LHR
2 stops15h 12mUnited Airlines
Deal found 1/22$901
This TravelUp deal was found by Cheapflights users on 1/22. 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.
Wed 2/59:00 amLHR - STL
2 stops20h 36mVirgin Atlantic
Sun 2/237:07 pmSTL - LHR
2 stops30h 08mVirgin Atlantic
Deal found 1/22$910
This lol.travel deal was found by Cheapflights users on 1/23. 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.
Mon 3/33:00 pmLHR - STL
2 stops30h 06mAir Canada
Mon 3/103:50 pmSTL - LHR
1 stop11h 40mAir Canada
Deal found 1/23$913
This Delta deal was found by Cheapflights users on 1/22. 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.
Wed 1/2910:00 amLHR - STL
2 stops17h 49mDelta
Fri 2/2810:22 amSTL - LHR
2 stops14h 33mDelta
Deal found 1/22$966
This Voliamo deal was found by Cheapflights users on 1/22. 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 Voliamo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/510:00 amLCY - STL
2 stops19h 30mLufthansa
Sun 2/235:36 pmSTL - LCY
2 stops33h 49mLufthansa
Deal found 1/22$971

Find flights from London to St. Louis within your budget

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 January 23, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 2/11

11:45 am-10:17 pm

1 stop16h 32m

Lambert-St Louis

Fri 2/14

11:04 am-8:15 am

1 stop15h 11m

$709

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 2/13

12:00 pm-10:08 pm

1 stop16h 08m

Lambert-St Louis

Wed 2/26

7:04 pm-10:35 am

2 stops33h 31m

$731

LondonSt. Louis

LCY - STL

LCYSTL

London City

Mon 3/3

9:15 am-11:30 am

3 stops32h 15m

Lambert-St Louis

Mon 3/10

12:15 pm-5:05 pm

3 stops23h 50m

$757

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Mon 3/10

8:20 am-3:06 pm

3 stops35h 46m

Lambert-St Louis

Mon 3/17

3:50 pm-8:15 pm

3 stops23h 25m

$760

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 3/13

10:15 am-8:41 pm

1 stop15h 26m

Lambert-St Louis

Thu 3/27

11:39 am-6:20 am

1 stop13h 41m

$816

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 5/5

10:30 am-8:01 pm

2 stops15h 31m

Lambert-St Louis

Mon 5/12

1:30 pm-10:00 am

1 stop14h 30m

$883

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/10

6:30 am-11:32 pm

2 stops22h 02m

Lambert-St Louis

Mon 3/17

12:05 pm-8:35 pm

1 stop27h 30m

$888

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/19

6:30 am-7:15 pm

2 stops18h 45m

Lambert-St Louis

Wed 2/26

1:03 pm-10:15 am

2 stops15h 12m

$901

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/5

9:00 am-11:36 pm

2 stops20h 36m

Lambert-St Louis

Sun 2/23

7:07 pm-7:15 am

2 stops30h 08m

$910

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/3

3:00 pm-3:06 pm

2 stops30h 06m

Lambert-St Louis

Mon 3/10

3:50 pm-8:30 am

1 stop11h 40m

$913

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 44 results
1
2
3
...
5

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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust 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.

Travel insights for flights from London to St. Louis

Get recent, data-driven insights about flights from London to St. Louis including ideal travel times, pricing trends, and more.

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 January 17, 2025.

Booking 80 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 January 23, 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 January 23, 2025.
See what other customers who have flown with United Airlines, Delta and Turkish 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
8,507 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Comfort

8.0

Reviews

1 / 10

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

Delta
8.0
Very good
8,507 reviews
Delta
8.0
Very good
8,507 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Comfort

8.0

Reviews

1 / 10

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

KLM
7.8
Good
1,338 reviews
Delta
8.0
Very good
8,507 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Comfort

8.0

Reviews

1 / 10

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

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,507 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Comfort

8.0

Reviews

1 / 10

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

Austrian Airlines
7.5
Good
787 reviews
Delta
8.0
Very good
8,507 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Comfort

8.0

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
663 reviews
Delta
8.0
Very good
8,507 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Comfort

8.0

Reviews

1 / 10

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 Finnair. Our recent data shows that you can find tickets from as low as $709 on this airline. Additional options worth looking into are British Airways and Lufthansa, starting at $816 and $888 round-trip. Finnair is currently priced 22% below the average price you’ll pay for this route.

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

    $612 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Aer Lingus and Lufthansa, with prices starting from $668 and $775, 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?

Book flights to London if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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.

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 January 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$278Average$1,357FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$867Average$1,142FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$925Average$928FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$961Average$1,259FlexibilityNo cancel feeOn-time70%
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.