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Cheap flights from the United Kingdom to St. Louis from £244

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 14 November 2025.

Wed 10/1206:30LHR - STL
2 stops20h 17mDelta
Wed 17/1214:02STL - LHR
1 stop10h 23mDelta
Deal found 12/11£546
Wed 10/1210:00LHR - STL
2 stops16h 47mVirgin Atlantic
Wed 17/1214:02STL - LHR
1 stop10h 23mVirgin Atlantic
Deal found 11/11£568
Wed 10/1208:20LHR - STL
1 stop14h 14mBritish Airways
Wed 17/1214:48STL - LHR
1 stop10h 12mBritish Airways
Deal found 11/11£572
Fri 12/1214:00LGW - STL
1 stop14h 33mMultiple Airlines
Thu 8/117:11STL - LGW
1 stop34h 49mMultiple Airlines
Deal found 13/11£574
Thu 25/1214:00LGW - STL
1 stop14h 33mMultiple Airlines
Sat 10/117:11STL - LGW
1 stop34h 49mMultiple Airlines
Deal found 13/11£577
Tue 2/1211:45LHR - STL
1 stop12h 40mAmerican Airlines
Tue 9/1210:56STL - LHR
1 stop13h 39mAmerican Airlines
Deal found 12/11£581
Tue 2/1211:45LHR - STL
2 stops15h 02mDelta
Tue 9/1206:00STL - LHR
1 stop19h 05mDelta
Deal found 12/11£588
Fri 12/1214:00LGW - STL
1 stop14h 33mMultiple Airlines
Wed 7/117:11STL - LGW
1 stop34h 49mMultiple Airlines
Deal found 13/11£600
Wed 10/1211:45LHR - STL
1 stop12h 58mBritish Airways
Thu 8/118:44STL - LHR
1 stop10h 51mBritish Airways
Deal found 12/11£603
Wed 10/1206:30LHR - STL
2 stops20h 17mDelta
Thu 8/118:55STL - LHR
1 stop10h 45mDelta
Deal found 12/11£606
Wed 10/1214:45LHR - STL
1 stop14h 21mAmerican Airlines
Fri 16/115:54STL - LHR
1 stop14h 06mAmerican Airlines
Deal found 13/11£611
Wed 10/1213:00LGW - STL
2 stops50h 47mMultiple Airlines
Fri 16/117:11STL - LGW
1 stop34h 54mMultiple Airlines
Deal found 13/11£611

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 14 November 2025.

Round-trip from

£531

One-way from

£244

Popular in

December

Cheapest in

March

Average price

£739

Good round-trip deal

£465 or less
British Airways
  • British Airways
  • 28/1-25/2
  • 2 total stops
  • 26h 55m total
  • United Kingdom to St. Louis
Search Deals
16/1
  • 16/1
  • 1 total stop
  • 14h 34m total
  • United Kingdom to St. Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£38 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 14 November 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

Thu 5/3

12:30-19:30

2 stops37h 00m

Lambert-St Louis

Mon 9/3

07:35-07:30

2 stops18h 55m

£547

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 7/1

12:40-23:25

2 stops16h 45m

Lambert-St Louis

Wed 14/1

09:59-08:05

2 stops16h 06m

£565

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 28/1

07:50-22:59

2 stops21h 09m

Lambert-St Louis

Wed 25/2

14:00-14:05

2 stops18h 05m

£575

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 26/1

11:55-19:29

1 stop13h 34m

Lambert-St Louis

Sun 1/2

11:55-06:50

1 stop12h 55m

£577

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 19/1

11:45-18:34

1 stop12h 49m

Lambert-St Louis

Fri 6/2

15:37-10:00

1 stop12h 23m

£578

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 19/1

06:30-17:50

2 stops17h 20m

Lambert-St Louis

Fri 6/2

09:59-06:55

2 stops14h 56m

£581

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 6/2

08:55-17:50

1 stop14h 55m

Lambert-St Louis

Sat 14/2

11:55-07:50

1 stop13h 55m

£586

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 2/12

11:45-20:47

2 stops15h 02m

Lambert-St Louis

Tue 9/12

06:00-07:05

1 stop19h 05m

£588

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 12/5

08:20-16:11

1 stop13h 51m

Lambert-St Louis

Sun 17/5

19:03-12:50

1 stop11h 47m

£591

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 21/4

11:45-23:38

2 stops17h 53m

Lambert-St Louis

Fri 1/5

13:30-10:15

2 stops14h 45m

£592

Flights are sorted by cheapest return flights first.

Deals found on 13/11

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 £412). Flying from United Kingdom to St. Louis in July is currently the most expensive (average of £628). 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 14 November 2025.

It’s optimal to fly from United Kingdom to St. Louis in the afternoon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight at midday.

What is the cheapest day to fly from United Kingdom to St. Louis?

Use this chart to determine the cheapest time to fly return from United Kingdom to St. Louis. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their United Kingdom to St. Louis flight should consider departing on Wednesday at midday when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 14 November 2025.
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
1,334 reviews
Check prices

Entertainment

6.9

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Entertainment

6.9

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Virgin Atlantic
7.5
Good
673 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Entertainment

6.9

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
United Airlines
7.4
Good
9,017 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Entertainment

6.9

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,572 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Entertainment

6.9

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,521 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Entertainment

6.9

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 45m. Fly via American Airlines, 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 United Airlines, with whom users have recently found tickets for as low as £380. However, be on the lookout for offers from Lufthansa and British Airways, 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 £682 for a flight from United Kingdom to St. Louis. The cheapest flight overall is £463 while the most popular route, (London Heathrow - Lambert-St Louis) is currently priced at £524.

  • 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 £412). Flying from United Kingdom to St. Louis in July is currently the most expensive (average of £628). 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

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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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£89Average£781FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Scandinavian AirlinesCheapest£489Average£671FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
KLMCheapest£513Average£902FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£519Average£737FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£586Average£829FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£616Average£768FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£634Average£880FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest£637Average£835FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£638Average£734FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£706Average£867FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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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