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Cheap flights from St. Louis to London from $399

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 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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 - 11:05 pm
STL
-
STN
25h 00m
3 stops
Multiple Airlines Logo
7:55 am - 8:09 pm
STN
-
STL
18h 14m
2 stops
$1,006Multiple Airlines
Sun, Apr 26 - Tue, May 12
Turkish Airlines Logo
7:45 am - 9:55 am
STL
-
STN
20h 10m
2 stops
Turkish Airlines Logo
10:50 am - 9:13 pm
STN
-
STL
40h 23m
2 stops
$1,032Turkish Airlines
Fri, Apr 24 - Fri, May 1
Multiple Airlines Logo
4:05 pm - 7:35 pm
STL
-
STN
21h 30m
2 stops
Multiple Airlines Logo
6:30 am - 3:25 pm
STN
-
STL
14h 55m
2 stops
$1,036Multiple Airlines
Tue, Apr 14 - Wed, Apr 22
Turkish Airlines Logo
7:45 am - 9:55 am
STL
-
STN
20h 10m
2 stops
Turkish Airlines Logo
6:55 am - 9:13 pm
STN
-
STL
20h 18m
2 stops
$1,042Turkish Airlines
Tue, Apr 21 - Tue, Apr 28
Turkish Airlines Logo
7:45 am - 9:55 am
STL
-
STN
44h 10m
2 stops
Turkish Airlines Logo
6:55 am - 9:13 pm
STN
-
STL
20h 18m
2 stops
$1,043Turkish Airlines
Mon, Apr 13 - Tue, Apr 28
Turkish Airlines Logo
7:45 am - 10:10 pm
STL
-
STN
32h 25m
2 stops
Turkish Airlines Logo
5:35 pm - 9:13 pm
STN
-
STL
33h 38m
2 stops
$1,045Turkish Airlines
Mon, Apr 6 - Tue, Apr 14
Multiple Airlines Logo
12:10 pm - 12:50 pm
STL
-
STN
18h 40m
2 stops
Multiple Airlines Logo
10:00 pm - 2:00 pm
STN
-
STL
22h 00m
2 stops
$1,071Multiple Airlines
Mon, Sep 21 - Mon, Oct 5
Multiple Airlines Logo
7:05 am - 12:40 am
STL
-
STN
35h 35m
3 stops
Multiple Airlines Logo
7:25 am - 1:25 pm
STN
-
STL
36h 00m
2 stops
$1,091Multiple Airlines
Sat, May 23 - Sun, May 31
Multiple Airlines Logo
7:05 am - 12:40 am
STL
-
STN
35h 35m
3 stops
Multiple Airlines Logo
7:25 am - 1:25 pm
STN
-
STL
36h 00m
3 stops
$1,114Multiple Airlines
Sat, May 23 - Sun, May 31
Multiple Airlines Logo
3:30 pm - 10:30 pm
STL
-
STN
25h 00m
2 stops
Multiple Airlines Logo
7:35 am - 8:25 pm
STN
-
STL
18h 50m
2 stops
$1,130Multiple Airlines
Fri, Apr 24 - Fri, May 1

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
Apr 24
STL7:45 amLambert-St Louis
20h 10m
2 stops
STN9:55 amLondon Stansted
May 1
STN10:50 amLondon Stansted
40h 23m
2 stops
STL9:13 pmLambert-St Louis
$1,032
Turkish Airlines
Apr 21
STL7:45 amLambert-St Louis
27h 05m
2 stops
STN4:50 pmLondon Stansted
Apr 28
STN6:55 amLondon Stansted
20h 18m
2 stops
STL9:13 pmLambert-St Louis
$1,042
Turkish Airlines
Apr 2
STL7:45 amLambert-St Louis
44h 10m
2 stops
STN9:55 amLondon Stansted
Apr 13
STN10:50 amLondon Stansted
40h 23m
2 stops
STL9:13 pmLambert-St Louis
$1,043

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 March 28, 2026.
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

Cheapest round-trip

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 4/26

4:05 pm-11:05 pm

3 stops25h 00m

London Stansted

Tue 5/12

7:55 am-8:09 pm

2 stops18h 14m

$1,006

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Fri 4/24

7:45 am-9:55 am

2 stops20h 10m

London Stansted

Fri 5/1

10:50 am-9:13 pm

2 stops40h 23m

$1,032
Quickest round-trip

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Tue 4/14

4:05 pm-7:35 pm

2 stops21h 30m

London Stansted

Wed 4/22

6:30 am-3:25 pm

2 stops14h 55m

$1,036

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Tue 4/21

7:45 am-9:55 am

2 stops20h 10m

London Stansted

Tue 4/28

6:55 am-9:13 pm

2 stops20h 18m

$1,042

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Mon 4/13

7:45 am-9:55 am

2 stops44h 10m

London Stansted

Tue 4/28

6:55 am-9:13 pm

2 stops20h 18m

$1,043

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Mon 4/6

7:45 am-10:10 pm

2 stops32h 25m

London Stansted

Tue 4/14

5:35 pm-9:13 pm

2 stops33h 38m

$1,045

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Mon 9/21

12:10 pm-12:50 pm

2 stops18h 40m

London Stansted

Mon 10/5

10:00 pm-2:00 pm

2 stops22h 00m

$1,071

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sat 5/23

7:05 am-12:40 am

3 stops35h 35m

London Stansted

Sun 5/31

7:25 am-1:25 pm

2 stops36h 00m

$1,091

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sat 5/23

7:05 am-12:40 am

3 stops35h 35m

London Stansted

Sun 5/31

7:25 am-1:25 pm

3 stops36h 00m

$1,114

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Fri 4/24

3:30 pm-10:30 pm

2 stops25h 00m

London Stansted

Fri 5/1

7:35 am-8:25 pm

2 stops18h 50m

$1,130

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from St. Louis to London Stansted Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to London Stansted?

Turkish Airlines is the most popular carrier operating from Lambert-St Louis to London Stansted

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

Fastest flight time

18h 40m

Direct flights

None
The fastest flight from St. Louis to London Stansted Airport takes 18h 40m
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.
Search flight deals

  • 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 18h 40m.

  • 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.

Traveling to a place near London?

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

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

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