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Cheap flights from the United Kingdom to St. Louis from £253

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 23/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
27 Feb — 6 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 28 January 2026.

Sun 1/306:30
LHR
-
STL
1 stop13h 25m
Lufthansa
Mon 9/317:41
STL
-
LHR
1 stop11h 44m
Lufthansa
Deal found 27/1£422
Fri 13/306:30
LHR
-
STL
1 stop13h 25m
Lufthansa
Tue 17/313:14
STL
-
LHR
1 stop11h 41m
Lufthansa
Deal found 25/1£432
Mon 9/312:05
LHR
-
STL
2 stops56h 24m
Multiple Airlines
Mon 16/319:00
STL
-
LHR
1 stop11h 15m
Multiple Airlines
Deal found 25/1£434
Mon 2/213:45
LHR
-
STL
2 stops55h 30m
Multiple Airlines
Mon 2/318:55
STL
-
LHR
1 stop10h 20m
Multiple Airlines
Deal found 26/1£437
Tue 24/209:00
LHR
-
STL
2 stops16h 14m
United Airlines
Tue 3/309:55
STL
-
LHR
2 stops14h 45m
United Airlines
Deal found 27/1£440
Sun 1/306:30
LHR
-
STL
1 stop13h 25m
United Airlines
Mon 9/311:25
STL
-
LHR
2 stops16h 00m
United Airlines
Deal found 27/1£441
Sun 1/306:30
LHR
-
STL
1 stop13h 25m
Lufthansa
Sat 14/319:00
STL
-
LHR
1 stop29h 55m
Lufthansa
Deal found 26/1£443
Wed 11/311:10
LHR
-
STL
2 stops16h 49m
United Airlines
Wed 18/311:25
STL
-
LHR
2 stops16h 00m
United Airlines
Deal found 25/1£444
Sun 1/207:30
LHR
-
STL
2 stops17h 57m
United Airlines
Sat 7/213:15
STL
-
LHR
1 stop12h 40m
United Airlines
Deal found 25/1£446
Thu 5/206:50
LHR
-
STL
2 stops15h 13m
United Airlines
Mon 9/209:57
STL
-
LHR
1 stop13h 58m
United Airlines
Deal found 26/1£446
Fri 17/406:30
LHR
-
STL
1 stop12h 55m
Lufthansa
Tue 21/418:35
STL
-
LHR
1 stop11h 10m
Lufthansa
Deal found 27/1£447
Thu 12/314:00
LGW
-
STL
1 stop22h 22m
Multiple Airlines
Thu 19/308:02
STL
-
LGW
1 stop20h 58m
Multiple Airlines
Deal found 26/1£472

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 28 January 2026.

Round-trip from

£422

One-way from

£253

Popular in

July

Cheapest in

March

Average price

£548

Good round-trip deal

£566 or less
Lufthansa
  • Lufthansa
  • 1/3-9/3
  • 2 total stops
  • 25h 09m total
  • United Kingdom to St. Louis
Search Deals
23/2
  • 23/2
  • 2 total stops
  • 46h 51m total
  • United Kingdom to St. Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£72 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 28 January 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

LHR - STL

LHRSTL

London Heathrow

Tue 24/2

09:00-19:14

2 stops16h 14m

Lambert-St Louis

Tue 3/3

12:15-09:10

2 stops14h 55m

£440

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 5/3

09:00-21:42

2 stops18h 42m

Lambert-St Louis

Sat 14/3

07:41-05:55

1 stop17h 14m

£440

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 17/4

06:30-13:25

1 stop12h 55m

Lambert-St Louis

Tue 21/4

13:10-06:45

1 stop11h 35m

£441

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 1/3

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Sun 15/3

19:00-11:15

1 stop11h 15m

£441

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 11/3

06:30-14:55

1 stop13h 25m

Lambert-St Louis

Wed 18/3

17:41-11:05

1 stop12h 24m

£441

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 13/3

06:30-14:55

1 stop13h 25m

Lambert-St Louis

Tue 17/3

11:25-06:40

2 stops14h 15m

£441

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 1/3

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Mon 9/3

11:25-08:25

2 stops16h 00m

£441

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 12/3

06:30-17:59

2 stops16h 29m

Lambert-St Louis

Thu 19/3

08:30-06:40

1 stop17h 10m

£446

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 19/3

08:30-21:07

2 stops17h 37m

Lambert-St Louis

Tue 31/3

11:15-06:45

1 stop13h 30m

£446

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 12/3

14:00-13:34

2 stops28h 34m

Lambert-St Louis

Thu 19/3

08:02-10:00

1 stop20h 58m

£481

Flights are sorted by cheapest return flights first.

Deals found on 26/1

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, September is the cheapest month in which you can book a flight from United Kingdom to St. Louis (average of £395). Flying from United Kingdom to St. Louis in July is currently the most expensive (average of £593). 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 28 January 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
1,356 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Comfort

7.5

Boarding

7.7

Entertainment

6.9

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
1,356 reviews
Finnair
7.6
Good
1,356 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Comfort

7.5

Boarding

7.7

Entertainment

6.9

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
1,356 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Comfort

7.5

Boarding

7.7

Entertainment

6.9

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
9,210 reviews
Finnair
7.6
Good
1,356 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Comfort

7.5

Boarding

7.7

Entertainment

6.9

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
7,749 reviews
Finnair
7.6
Good
1,356 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Comfort

7.5

Boarding

7.7

Entertainment

6.9

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
7,704 reviews
Finnair
7.6
Good
1,356 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Comfort

7.5

Boarding

7.7

Entertainment

6.9

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 16h 14m. Fly via United Airlines, British Airways, or KLM 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 £335. However, be on the lookout for offers from Finnair and WestJet, 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 City - 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 £710 for a flight from United Kingdom to St. Louis. The cheapest flight overall is £470 while the most popular route, (London Heathrow - Lambert-St Louis) is currently priced at £422.

  • 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, September is the cheapest month in which you can book a flight from United Kingdom to St. Louis (average of £395). Flying from United Kingdom to St. Louis in July is currently the most expensive (average of £593). 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

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Alternative routes for United Kingdom to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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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 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£167Average£748FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£462Average£792FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£467Average£777FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£483Average£687FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£491Average£867FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£542Average£850FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£581Average£681FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air CanadaCheapest£589Average£726FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£607Average£838FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest£631Average£711FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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