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

$285+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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.

Cheap 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 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Sun 3/16:30 am
LHR
-
STL
1 stop13h 25m
Lufthansa
Mon 3/95:41 pm
STL
-
LHR
1 stop11h 44m
Lufthansa
Deal found 1/27$580
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Tue 2/249:00 am
LHR
-
STL
2 stops16h 14m
United Airlines
Tue 3/39:55 am
STL
-
LHR
2 stops14h 45m
United Airlines
Deal found 1/27$605
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Sun 3/16:30 am
LHR
-
STL
1 stop13h 25m
United Airlines
Mon 3/911:25 am
STL
-
LHR
2 stops16h 00m
United Airlines
Deal found 1/27$606
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:35 am
LHR
-
STL
2 stops19h 48m
Lufthansa
Fri 2/271:11 pm
STL
-
LHR
1 stop10h 44m
Lufthansa
Deal found 1/27$612
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/56:50 am
LHR
-
STL
2 stops15h 13m
United Airlines
Mon 2/99:57 am
STL
-
LHR
1 stop13h 58m
United Airlines
Deal found 1/26$613
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:30 am
LHR
-
STL
1 stop12h 55m
Lufthansa
Tue 4/216:35 pm
STL
-
LHR
1 stop11h 10m
Lufthansa
Deal found 1/27$614
This TravelUp deal was found by Cheapflights users on 1/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2411:45 am
LHR
-
STL
1 stop13h 07m
British Airways
Tue 3/36:18 pm
STL
-
LHR
1 stop11h 57m
British Airways
Deal found 1/27$618
This TravelUp deal was found by Cheapflights users on 1/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:30 am
LHR
-
STL
1 stop12h 55m
Multiple Airlines
Fri 5/81:00 pm
STL
-
LHR
1 stop11h 30m
Multiple Airlines
Deal found 1/27$621
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:00 am
LHR
-
STL
2 stops20h 05m
Air Canada
Fri 5/81:00 pm
STL
-
LHR
1 stop11h 30m
Air Canada
Deal found 1/27$625
This TravelUp deal was found by Cheapflights users on 1/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:25 pm
LHR
-
STL
2 stops31h 38m
Virgin Atlantic
Mon 11/27:05 pm
STL
-
LHR
1 stop29h 20m
Virgin Atlantic
Deal found 1/27$627
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/18:05 pm
LCY
-
STL
2 stops26h 37m
KLM
Mon 3/912:04 pm
STL
-
LCY
2 stops14h 11m
KLM
Deal found 1/27$721
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Fri 5/12:00 pm
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Wed 5/138:13 pm
STL
-
LGW
2 stops31h 47m
Multiple Airlines
Deal found 1/28$774

Find 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 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$580
(Kiwi.com)

One-way from

$285
(Kiwi.com)

Popular in

July

Cheapest in

March

Average price

$753

Good round-trip deal

$803 or less

Good one-way deal

$446 or less
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. 12% potential increase in price ($136 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from London (LON) to Lambert-St Louis.
Search Deals

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 January 29, 2026.
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

Tue 2/24

9:00 am-7:14 pm

2 stops16h 14m

Lambert-St Louis

Tue 3/3

12:15 pm-9:10 am

2 stops14h 55m

$605

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 3/1

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

Sun 3/15

7:00 pm-11:15 am

1 stop11h 15m

$606

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 3/13

6:30 am-2:55 pm

1 stop13h 25m

Lambert-St Louis

Fri 3/20

6:00 am-7:30 am

1 stop20h 30m

$606

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 3/1

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

Mon 3/9

11:25 am-8:25 am

2 stops16h 00m

$606

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 2/20

6:35 am-8:23 pm

2 stops19h 48m

Lambert-St Louis

Fri 2/27

1:11 pm-5:55 am

1 stop10h 44m

$612

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 2/5

6:50 am-4:03 pm

2 stops15h 13m

Lambert-St Louis

Mon 2/9

9:57 am-5:55 am

1 stop13h 58m

$613

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sun 3/1

8:05 pm-4:42 pm

2 stops26h 37m

Lambert-St Louis

Mon 3/9

12:04 pm-7:15 am

2 stops14h 11m

$721

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Sun 3/1

1:00 pm-11:59 pm

2 stops40h 59m

Lambert-St Louis

Mon 3/9

7:47 am-10:00 am

1 stop21h 13m

$821

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Tue 2/24

9:00 am-2:09 pm

1 stop35h 09m

Lambert-St Louis

Tue 3/3

3:49 pm-6:00 am

2 stops32h 11m

$849

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Mon 5/4

7:50 pm-8:04 pm

2 stops30h 14m

Lambert-St Louis

Sun 10/18

9:10 am-2:35 pm

3 stops23h 25m

$993

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 56 results
1
2
3
...
6

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
ExpediaPrice Accuracy1 starTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 January 23, 2026.

Booking 48 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, September is the cheapest month in which you can book a flight from London to St. Louis (average of $543). Flying from London to St. Louis in July is currently the most expensive (average of $814). 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.

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 January 29, 2026.
Get a feel of what it's like to fly with British Airways 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.
British Airways
6.7
Okay
7,705 reviews

Comfort

6.8

Crew

7.6

Boarding

6.9

Food

6.4

Entertainment

6.4

Overall

6.7

Reviews

1 / 20
6.0
Good

Roxanne,Sep 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,705 reviews
British Airways
6.7
Okay
7,705 reviews

Comfort

6.8

Crew

7.6

Boarding

6.9

Food

6.4

Entertainment

6.4

Overall

6.7

Reviews

1 / 20
6.0
Good

Roxanne,Sep 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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 2 different airlines.

  • How long is the flight from London to St. Louis?

    A quick flight from London to St. Louis can take about 16h 14m. United Airlines provides one of the quickest options available for as low as $605. There are 4186 mi between London and St. Louis. This flight may include one or multiple stops.

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

    Our cheapest airline available from London to St. Louis is British Airways. Our recent data shows that you can find tickets from as low as $555 on this airline. An additional option worth looking into is United Airlines, starting at $654. British Airways is currently priced 42% below the average price you’ll pay for this route.

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

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

  • What are the cheapest flights from London to St. Louis?

    The cheapest flight price from London to St. Louis is $438. On average you can expect to pay $725. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for $580.

  • 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, September is the cheapest month in which you can book a flight from London to St. Louis (average of $543). Flying from London to St. Louis in July is currently the most expensive (average of $814). 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
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

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 2 airlines flying from London to St. Louis

Discover the top 2 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$874FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$654Average$1,162FlexibilityNo cancel feeOn-time69%

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.