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Cheap flights from the United Kingdom to St. Louis from £263

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
15 Mar — 22 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to St. Louis
Explore the most affordable flight options available from United Kingdom to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 February 2026.

Mon 9/314:00
LGW
-
STL
1 stop14h 19m
Multiple Airlines
Mon 23/312:16
STL
-
LGW
2 stops40h 44m
Multiple Airlines
Deal found 10/2£434
Fri 13/314:00
LGW
-
STL
1 stop14h 19m
Multiple Airlines
Fri 20/312:16
STL
-
LGW
2 stops40h 49m
Multiple Airlines
Deal found 12/2£470
Thu 5/314:00
LGW
-
STL
1 stop15h 59m
Multiple Airlines
Sun 15/320:06
STL
-
LGW
2 stops32h 54m
Multiple Airlines
Deal found 10/2£483
Wed 22/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Wed 29/420:13
STL
-
LGW
2 stops52h 07m
Multiple Airlines
Deal found 10/2£522
Tue 1/916:25
LHR
-
STL
Nonstop9h 05m
Multiple Airlines
Tue 22/909:32
STL
-
LHR
1 stop15h 23m
Multiple Airlines
Deal found 10/2£535
Wed 22/416:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 29/420:03
STL
-
LHR
1 stop10h 12m
British Airways
Deal found 10/2£536
Wed 22/407:30
LHR
-
STL
2 stops20h 47m
Finnair
Wed 29/417:21
STL
-
LHR
1 stop12h 54m
Finnair
Deal found 10/2£538
Wed 22/414:45
LHR
-
STL
1 stop13h 32m
Multiple Airlines
Wed 29/413:29
STL
-
LHR
1 stop11h 21m
Multiple Airlines
Deal found 10/2£539
Tue 1/907:30
LHR
-
STL
2 stops22h 21m
Finnair
Tue 22/912:11
STL
-
LHR
1 stop18h 39m
Finnair
Deal found 10/2£541
Tue 1/912:00
LHR
-
STL
1 stop13h 23m
British Airways
Tue 22/912:47
STL
-
LHR
1 stop12h 08m
British Airways
Deal found 11/2£541
Mon 16/311:15
LHR
-
STL
1 stop17h 43m
Finnair
Mon 30/311:22
STL
-
LHR
1 stop17h 43m
Finnair
Deal found 10/2£549
Mon 16/311:45
LHR
-
STL
2 stops17h 13m
Delta
Mon 30/310:12
STL
-
LHR
2 stops14h 58m
Delta
Deal found 10/2£551

Find flight deals from United Kingdom to St. Louis

Keep the following information in mind while searching for United Kingdom to St. Louis flight deals. Data was last updated 13 February 2026.

Round-trip from

£434

One-way from

£263

Popular in

July

Cheapest in

March

Average price

£640

Good round-trip deal

£596 or less
9/3-23/3
  • 9/3-23/3
  • 3 total stops
  • 55h 03m total
  • United Kingdom to St. Louis
Search Deals
12/3
  • 12/3
  • 1 total stop
  • 14h 19m total
  • United Kingdom to St. Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£73 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom 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 858,174 searches. Data last updated 13 February 2026.
Use the filters below to find and compare flights from the United Kingdom to St. Louis that are best for you.

Fly from

United Kingdom

Fly to

St. Louis

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 9/3

14:00-23:19

1 stop14h 19m

Lambert-St Louis

Mon 23/3

12:16-10:00

2 stops40h 44m

£434

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 13/3

14:00-23:19

1 stop14h 19m

Lambert-St Louis

Fri 20/3

12:16-10:05

2 stops40h 49m

£470

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 5/3

14:00-23:59

1 stop15h 59m

Lambert-St Louis

Sun 15/3

20:06-10:00

2 stops32h 54m

£483

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 16/3

11:15-23:58

1 stop17h 43m

Lambert-St Louis

Mon 30/3

11:22-11:05

1 stop17h 43m

£549

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 16/3

11:45-23:58

2 stops17h 13m

Lambert-St Louis

Mon 30/3

10:12-07:10

2 stops14h 58m

£551

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 29/4

08:40-20:42

2 stops18h 02m

Lambert-St Louis

Wed 20/5

18:57-14:35

2 stops13h 38m

£563

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 3/3

15:45-21:12

2 stops35h 27m

Lambert-St Louis

Sun 8/3

11:09-19:00

1 stop26h 51m

£579

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 30/4

06:15-19:29

2 stops19h 14m

Lambert-St Louis

Thu 7/5

08:54-06:50

1 stop15h 56m

£579

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 30/4

11:00-19:33

2 stops14h 33m

Lambert-St Louis

Thu 7/5

05:46-06:25

2 stops18h 39m

£579

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 5/3

12:30-08:35

2 stops26h 05m

Lambert-St Louis

Sun 15/3

09:15-09:00

2 stops18h 45m

£636

Flights are sorted by cheapest return flights first.

Deals found on 12/2

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to St. Louis

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

Currently, May is the cheapest month in which you can book a flight from United Kingdom to St. Louis (average of £289). Flying from United Kingdom to St. Louis in December is currently the most expensive (average of £619). 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.

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 13 February 2026.
See what other customers who have flown with Finnair, Virgin Atlantic, andUnited Airlines from the United Kingdom to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,362 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,362 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
678 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,289 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Lufthansa
6.8
Okay
7,784 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,739 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Comfort

7.4

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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 United Kingdom?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from United Kingdom to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

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

    There are many flights that can get you from United Kingdom to St. Louis in 17h 13m. Fly via Finnair, Delta, or British Airways to get the fastest option. The distance from United Kingdom to St. Louis is about 4186 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £337. However, be on the lookout for offers from United Airlines and Finnair, as they are both options that can get you from United Kingdom to St. Louis for a low price.

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

    When deciding which route to take from United Kingdom to St. Louis consider London Heathrow - Lambert-St Louis, London Gatwick - Lambert-St Louis or London Stansted - Lambert-St Louis as they are the most popular.

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

    On average you can expect to pay £668 for a flight from United Kingdom to St. Louis. The cheapest flight overall is £471 while the most popular route, (London Heathrow - Lambert-St Louis) is currently priced at £536.

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

    Yes. In addition to deals on United Kingdom to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.

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

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to St. Louis?

    Currently, May is the cheapest month in which you can book a flight from United Kingdom to St. Louis (average of £289). Flying from United Kingdom to St. Louis in December is currently the most expensive (average of £619). 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

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 10 airlines flying from United Kingdom to St. Louis

Discover the top 10 airlines that operate flights from United Kingdom 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 858,174 searches. Data last updated 13 February 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£168Average£754FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£465Average£785FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£470Average£783FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£487Average£694FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£495Average£869FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£546Average£861FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£585Average£686FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air CanadaCheapest£593Average£729FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£598Average£832FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest£638Average£717FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

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How does Cheapflights help users find flights from United Kingdom to St. Louis?

Cheapflights makes it easy to find United Kingdom to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to St. Louis?

Cheapflights helps you find that perfect flight to St. Louis from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from United Kingdom to St. Louis with no change fees?

Need flexible booking options for your flight to St. Louis from United Kingdom? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to St. Louis become cheaper?

Yes! Start tracking prices for United Kingdom to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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