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Cheap flights from the United Kingdom to St. Louis from £338

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
5 Jul — 12 Jul1
1 adult

Cheap 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 30 June 2025.

Round-trip from

£608

One-way from

£338

Popular in

December

Cheapest in

March

Average price

£674
13/8-4/9
  • 13/8-4/9
  • 2 total stops
  • 34h 50m total
  • United Kingdom to St. Louis
15/9
  • 15/9
  • 3 total stops
  • 57h 06m total
  • United Kingdom to St. Louis
Highest demand for flights based on searches. 3% potential increase in price (£15 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Average for round-trip flights in June 2025

Find flight deals from United Kingdom to St. Louis

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 30 June 2025.

Wed 13/813:05LGW - STL
1 stop16h 30mMultiple Airlines
Thu 4/906:00STL - LGW
1 stop18h 20mMultiple Airlines
Deal found 29/6£608
Thu 14/806:55STN - STL
3 stops42h 50mMultiple Airlines
Thu 11/914:30STL - STN
3 stops23h 00mMultiple Airlines
Deal found 29/6£609
Fri 3/1006:40LHR - STL
2 stops20h 09mScandinavian Airlines
Wed 8/1013:30STL - LHR
2 stops23h 00mScandinavian Airlines
Deal found 28/6£615
Wed 20/815:05LHR - STL
3 stops28h 27mMultiple Airlines
Wed 17/913:30STL - LHR
1 stop11h 00mMultiple Airlines
Deal found 29/6£619
Sat 8/1108:00LHR - STL
1 stop14h 22mUnited Airlines
Sat 22/1107:00STL - LHR
1 stop17h 20mUnited Airlines
Deal found 28/6£630
Thu 21/806:05LTN - STL
3 stops37h 27mMultiple Airlines
Sun 31/814:30STL - LTN
3 stops25h 35mMultiple Airlines
Deal found 29/6£641
Fri 5/1206:30LHR - STL
1 stop13h 25mLufthansa
Fri 12/1217:18STL - LHR
2 stops21h 17mLufthansa
Deal found 28/6£669
Tue 25/1113:10LHR - STL
1 stop13h 06mBritish Airways
Mon 1/1217:57STL - LHR
1 stop11h 43mBritish Airways
Deal found 28/6£699
Sun 24/806:50LHR - STL
2 stops19h 10mAir Canada
Tue 9/909:15STL - LHR
2 stops18h 20mAir Canada
Deal found 30/6£718
Tue 25/1116:00LHR - STL
1 stop13h 44mAustrian Airlines
Mon 1/1211:49STL - LHR
1 stop14h 36mAustrian Airlines
Deal found 28/6£721
Thu 4/1209:40LCY - STL
2 stops20h 05mLufthansa
Mon 8/1213:27STL - LCY
2 stops21h 13mLufthansa
Deal found 27/6£723
Wed 8/1008:40LCY - STL
2 stops17h 55mVirgin Atlantic
Wed 22/1014:18STL - LCY
2 stops13h 12mVirgin Atlantic
Deal found 28/6£729

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 30 June 2025.
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

Wed 13/8

13:05-23:35

1 stop16h 30m

Lambert-St Louis

Thu 4/9

06:00-06:20

1 stop18h 20m

£608

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Thu 14/8

06:55-19:45

3 stops42h 50m

Lambert-St Louis

Thu 11/9

14:30-19:30

3 stops23h 00m

£609

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 3/10

06:40-20:49

2 stops20h 09m

Lambert-St Louis

Wed 8/10

13:30-18:30

2 stops23h 00m

£615

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 20/8

15:05-13:32

3 stops28h 27m

Lambert-St Louis

Wed 17/9

13:30-06:30

1 stop11h 00m

£619

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 8/11

08:00-16:22

1 stop14h 22m

Lambert-St Louis

Sat 22/11

07:00-06:20

1 stop17h 20m

£630

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Thu 21/8

06:05-13:32

3 stops37h 27m

Lambert-St Louis

Sun 31/8

14:30-22:05

3 stops25h 35m

£641

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 5/12

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Fri 12/12

17:18-20:35

2 stops21h 17m

£669

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 25/11

13:10-20:16

1 stop13h 06m

Lambert-St Louis

Mon 1/12

17:57-11:40

1 stop11h 43m

£699

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 24/8

06:50-20:00

2 stops19h 10m

Lambert-St Louis

Tue 9/9

09:15-09:35

2 stops18h 20m

£718

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 25/11

16:00-23:44

1 stop13h 44m

Lambert-St Louis

Mon 1/12

11:49-08:25

1 stop14h 36m

£721

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 51 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, February is the cheapest month in which you can book a flight from United Kingdom to St. Louis (average of £722). Flying from United Kingdom to St. Louis in December is currently the most expensive (average of £1,033). 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 GB to STL?

Find hourly flight availability from United Kingdom 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 30 June 2025.

When flying from United Kingdom to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 30 June 2025.
See what other customers who have flown with Delta, KLM, andAustrian 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.

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £708. However, be on the lookout for offers from British Airways and Austrian Airlines, 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?

  • 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, February is the cheapest month in which you can book a flight from United Kingdom to St. Louis (average of £722). Flying from United Kingdom to St. Louis in December is currently the most expensive (average of £1,033). 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

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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 30 June 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£170Average£749FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Scandinavian AirlinesCheapest£468Average£606FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
FinnairCheapest£499Average£670FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£612Average£704FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£616Average£812FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£621Average£893FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£626Average£839FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£661Average£844FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£701Average£864FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest£708Average£830FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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