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Cheap flights from St. Louis to London from £235

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to London departing on 20/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to London (STL-STN)

Cheap return flights

Logo
15:50 - 20:55STL-STN
23h 05m2 stops
Logo
21:20 - 13:55STN-STL
22h 35m2 stops
£460
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Wed, 12 Nov - Tue, 18 Nov
Logo
15:50 - 18:10STL-STN
20h 20m2 stops
Logo
19:45 - 13:55STN-STL
24h 10m2 stops
£533
Find Deal
Wed, 12 Nov - Tue, 18 Nov
Lufthansa Logo
17:30 - 19:00STL-STN
43h 30m2 stops
Lufthansa Logo
19:50 - 15:44STN-STL
25h 54m2 stops
£650Lufthansa
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Sun, 21 Sep - Tue, 30 Sep
Logo
07:00 - 10:40STL-STN
21h 40m3 stops
Logo
20:25 - 13:30STN-STL
23h 05m2 stops
£1,028
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Sun, 21 Sep - Tue, 7 Oct
Logo
15:30 - 17:30STL-STN
20h 00m2 stops
Logo
17:25 - 13:30STN-STL
26h 05m3 stops
£1,048
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Sun, 21 Sep - Tue, 30 Sep
Logo
07:00 - 10:40STL-STN
21h 40m3 stops
Logo
12:15 - 13:30STN-STL
31h 15m3 stops
£1,058
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Sun, 21 Sep - Tue, 7 Oct
Logo
15:50 - 16:00STL-STN
18h 10m2 stops
Logo
19:30 - 13:55STN-STL
24h 25m2 stops
£1,128
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Wed, 12 Nov - Tue, 18 Nov
Logo
15:30 - 14:00STL-STN
16h 30m1 stop
Logo
15:50 - 13:30STN-STL
27h 40m2 stops
£1,226
Find Deal
Sun, 21 Sep - Tue, 7 Oct
Logo
15:30 - 14:00STL-STN
16h 30m1 stop
Logo
15:50 - 13:30STN-STL
27h 40m2 stops
£1,229
Find Deal
Sun, 21 Sep - Tue, 7 Oct
Logo
08:50 - 21:10STL-STN
30h 20m3 stops
Logo
06:20 - 22:05STN-STL
21h 45m3 stops
£1,247
Find Deal
Mon, 1 Sep - Fri, 5 Sep

momondo Fare Finder

 
Customise your flight search to find flights from St. Louis to London Stansted Airport 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, momondo users made 279,928 searches. Data last updated 18 August 2025.
Use the filters below to find and compare flights from St. Louis to London Stansted Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Wed 12/11

15:50-20:55

2 stops23h 05m

London Stansted

Tue 18/11

21:20-13:55

2 stops22h 35m

£460

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Wed 12/11

15:50-18:10

2 stops20h 20m

London Stansted

Tue 18/11

19:45-13:55

2 stops24h 10m

£533

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 21/9

17:30-19:00

2 stops43h 30m

London Stansted

Tue 30/9

19:50-15:44

2 stops25h 54m

£650

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 21/9

07:00-10:40

3 stops21h 40m

London Stansted

Tue 7/10

20:25-13:30

2 stops23h 05m

£1,028

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 21/9

15:30-17:30

2 stops20h 00m

London Stansted

Tue 30/9

17:25-13:30

3 stops26h 05m

£1,048

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 21/9

07:00-10:40

3 stops21h 40m

London Stansted

Tue 7/10

12:15-13:30

3 stops31h 15m

£1,058

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Wed 12/11

15:50-16:00

2 stops18h 10m

London Stansted

Tue 18/11

19:30-13:55

2 stops24h 25m

£1,128

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 21/9

15:30-14:00

1 stop16h 30m

London Stansted

Tue 7/10

15:50-13:30

2 stops27h 40m

£1,226

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 21/9

15:30-14:00

1 stop16h 30m

London Stansted

Tue 7/10

15:50-13:30

2 stops27h 40m

£1,229

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Mon 1/9

08:50-21:10

3 stops30h 20m

London Stansted

Fri 5/9

06:20-22:05

3 stops21h 45m

£1,247

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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When to book flights from St. Louis to London Stansted Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to London Stansted Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to London Stansted Airport (STL to STN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to London Stansted Airport

Best price found

£235

Fastest flight time

16h 30m

Direct flights

None
The best one-way flight to London Stansted Airport from St. Louis in the past 72 hours is £235. The best return flight deal from St. Louis to London Stansted Airport found on momondo in the last 72 hours is £460.
The fastest flight from St. Louis to London Stansted Airport takes 16h 30m
There are no direct flights from St. Louis to London Stansted Airport. Popular non-direct route for this connection is Lambert-St Louis Airport - London Stansted Airport.
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  • How far is Lambert-St Louis to London Stansted by plane?

    London Stansted is 4199.6 mi away from Lambert-St Louis. In terms of flight time, this usually takes a little over 16h 30m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to London Stansted Airport?

    Prices for flights from Lambert-St Louis Airport to London Stansted Airport are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to London Stansted Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to London Stansted Airport.

  • What documentation or ID do you need to fly to London Stansted Airport?

    The travel and health documents you'll need for your trip to London Stansted Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Stansted Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from St. Louis to London Stansted Airport?

    Price Alerts will notify you by email when the price for flights to London Stansted Airport from St. Louis decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from St. Louis to London Stansted Airport with momondo?

    By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Slough
Maidstone
Gatwick
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Colchester
Worthing
Hounslow
Dartford
Dover
Chelmsford
Hayes
Bedford
Winchester

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to London. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to London flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to London?

momondo helps you find the best flight between St. Louis and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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