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Cheap flights from St. Louis to London from $393

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 1/9. 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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0 bags

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Find the cheapest flights from St. Louis to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 5:40 pmSTL-STN
19h 35m3 stops
Multiple Airlines Logo
9:30 am - 1:55 pmSTN-STL
34h 25m2 stops
$899Multiple Airlines
Find Deal
Tue, Dec 16 - Tue, Dec 23
Multiple Airlines Logo
4:05 pm - 5:40 pmSTL-STN
19h 35m3 stops
Multiple Airlines Logo
9:30 am - 1:55 pmSTN-STL
34h 25m3 stops
$1,001Multiple Airlines
Find Deal
Tue, Dec 16 - Tue, Dec 23
Multiple Airlines Logo
3:50 pm - 8:35 pmSTL-STN
22h 45m2 stops
Multiple Airlines Logo
6:45 pm - 3:29 pmSTN-STL
26h 44m2 stops
$1,043Multiple Airlines
Find Deal
Fri, Nov 28 - Fri, Dec 5
Turkish Airlines Logo
8:00 am - 4:20 pmSTL-STN
27h 20m2 stops
Turkish Airlines Logo
5:20 pm - 9:00 pmSTN-STL
32h 40m2 stops
$1,050Turkish Airlines
Find Deal
Thu, Mar 19 - Thu, Mar 26
Turkish Airlines Logo
5:18 pm - 10:15 amSTL-STN
34h 57m2 stops
Turkish Airlines Logo
5:45 pm - 2:18 pmSTN-STL
26h 33m2 stops
$1,101Turkish Airlines
Find Deal
Sat, Apr 25 - Sat, May 2
Turkish Airlines Logo
5:18 pm - 4:50 pmSTL-STN
41h 32m2 stops
Turkish Airlines Logo
5:45 pm - 2:18 pmSTN-STL
26h 33m2 stops
$1,102Turkish Airlines
Find Deal
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
6:43 pm - 10:40 pmSTL-STN
21h 57m3 stops
Multiple Airlines Logo
3:30 pm - 1:55 pmSTN-STL
28h 25m2 stops
$1,215Multiple Airlines
Find Deal
Mon, Dec 1 - Thu, Dec 4
Turkish Airlines Logo
5:18 pm - 10:10 pmSTL-STN
22h 52m2 stops
Turkish Airlines Logo
5:45 pm - 2:18 pmSTN-STL
26h 33m2 stops
$1,263Turkish Airlines
Find Deal
Fri, Apr 17 - Tue, Apr 28
Turkish Airlines Logo
8:00 am - 4:20 pmSTL-STN
27h 20m2 stops
Turkish Airlines Logo
11:10 am - 2:18 pmSTN-STL
57h 08m2 stops
$1,319Turkish Airlines
Find Deal
Thu, Mar 19 - Sun, Mar 29
Turkish Airlines Logo
5:18 pm - 10:10 pmSTL-STN
22h 52m2 stops
Turkish Airlines Logo
5:45 pm - 2:18 pmSTN-STL
50h 33m2 stops
$1,436Turkish Airlines
Find Deal
Sun, Apr 26 - Thu, Apr 30

Turkish Airlines flights from St. Louis to London Stansted Airport

Our best Turkish Airlines deals on St. Louis to London Stansted Airport flight tickets
Turkish Airlines
Mar 19
STL8:00 amLambert-St Louis
27h 20m
2 stops
STN4:20 pmLondon Stansted
Mar 26
STN5:20 pmLondon Stansted
32h 40m
2 stops
STL9:00 pmLambert-St Louis
$1,050
Find similar
Turkish Airlines
Apr 25
STL5:18 pmLambert-St Louis
34h 57m
2 stops
STN10:15 amLondon Stansted
May 2
STN5:45 pmLondon Stansted
26h 33m
2 stops
STL2:18 pmLambert-St Louis
$1,101
Find similar
Turkish Airlines
Apr 7
STL5:18 pmLambert-St Louis
41h 32m
2 stops
STN4:50 pmLondon Stansted
Apr 14
STN5:45 pmLondon Stansted
26h 33m
2 stops
STL2:18 pmLambert-St Louis
$1,102
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated November 3, 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

Tue 12/16

4:05 pm-5:40 pm

3 stops19h 35m

London Stansted

Tue 12/23

9:30 am-1:55 pm

2 stops34h 25m

$899

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Tue 12/16

4:05 pm-5:40 pm

3 stops19h 35m

London Stansted

Tue 12/23

9:30 am-1:55 pm

3 stops34h 25m

$1,001

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Fri 11/28

3:50 pm-8:35 pm

2 stops22h 45m

London Stansted

Fri 12/5

6:45 pm-3:29 pm

2 stops26h 44m

$1,043

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Thu 3/19

8:00 am-4:20 pm

2 stops27h 20m

London Stansted

Thu 3/26

5:20 pm-9:00 pm

2 stops32h 40m

$1,050

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sat 4/25

5:18 pm-10:15 am

2 stops34h 57m

London Stansted

Sat 5/2

5:45 pm-2:18 pm

2 stops26h 33m

$1,101

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Tue 4/7

5:18 pm-4:50 pm

2 stops41h 32m

London Stansted

Tue 4/14

5:45 pm-2:18 pm

2 stops26h 33m

$1,102

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Mon 12/1

6:43 pm-10:40 pm

3 stops21h 57m

London Stansted

Thu 12/4

3:30 pm-1:55 pm

2 stops28h 25m

$1,215

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Fri 4/17

5:18 pm-10:10 pm

2 stops22h 52m

London Stansted

Tue 4/28

5:45 pm-2:18 pm

2 stops26h 33m

$1,263

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Thu 3/19

8:00 am-4:20 pm

2 stops27h 20m

London Stansted

Sun 3/29

11:10 am-2:18 pm

2 stops57h 08m

$1,319

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 4/26

5:18 pm-10:10 pm

2 stops22h 52m

London Stansted

Thu 4/30

5:45 pm-2:18 pm

2 stops50h 33m

$1,436

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 round-trip 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

Direct flights

None
There are no direct flights from St. Louis to London Stansted Airport. There are no popular flight routes from St. Louis to London Stansted Airport.
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  • How far is Lambert-St Louis to London Stansted by plane?

    There are 4199.6 mi between Lambert-St Louis and London Stansted. By plane, this route typically takes 17h 45m.

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from London Stansted Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

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

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • 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.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Folkestone
Romford
Ilford
Cobham
Wembley
Stansted
Watford
Harrow

Why use momondo?

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

Finding the right flight to London from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to London from St. Louis with this policy.

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?

Yes momondo offers price alerts on flights to London from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London Stansted Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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