Cheap flights from St. Louis to London from $244

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 10/19. 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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Cheap round-trip flights

 Logo
1:30 pm - 8:55 pmSTL-STN
25h 25m2 stops
 Logo
10:00 pm - 8:00 pmSTN-STL
28h 00m2 stops
mié., ago. 13 - mié., ago. 20
Air Canada Logo
1:30 pm - 10:00 amSTL-LHR
14h 30m1 stop
Air Canada Logo
9:30 am - 7:57 pmLHR-STL
16h 27m1 stop
$493Air Canada
Find Deal
dom., ago. 17 - mar., sep. 2
British Airways Logo
1:15 pm - 7:55 amSTL-LHR
12h 40m1 stop
British Airways Logo
6:10 am - 8:47 pmLHR-STL
20h 37m2 stops
$507British Airways
Find Deal
mié., ago. 20 - vie., ago. 29
United Airlines Logo
11:49 am - 6:20 amSTL-LHR
12h 31m1 stop
United Airlines Logo
1:25 pm - 2:20 pmLHR-STL
30h 55m2 stops
$510United Airlines
Find Deal
mié., nov. 19 - mié., nov. 26
United Airlines Logo
10:30 am - 7:10 amSTL-LHR
14h 40m2 stops
United Airlines Logo
1:25 pm - 11:20 amLHR-STL
27h 55m2 stops
$511United Airlines
Find Deal
mié., nov. 19 - vie., dic. 5
British Airways Logo
1:42 pm - 7:20 amSTL-LHR
11h 38m1 stop
British Airways Logo
12:15 pm - 8:32 pmLHR-STL
14h 17m1 stop
$512British Airways
Find Deal
dom., ago. 24 - vie., sep. 5
Iberia Logo
8:01 pm - 10:20 amSTL-LHR
32h 19m1 stop
Iberia Logo
8:20 am - 8:53 pmLHR-STL
18h 33m1 stop
$533Iberia
Find Deal
sáb., ago. 2 - mar., oct. 14
Iberia Logo
8:01 pm - 10:20 amSTL-LHR
32h 19m1 stop
Iberia Logo
2:25 pm - 8:23 pmLHR-STL
11h 58m1 stop
$583Iberia
Find Deal
sáb., ago. 2 - dom., oct. 19
American Airlines Logo
6:02 am - 8:10 amSTL-LGW
20h 08m2 stops
American Airlines Logo
3:05 pm - 9:15 amLGW-STL
24h 10m2 stops
$715American Airlines
Find Deal
sáb., ago. 23 - sáb., ago. 30
American Airlines Logo
9:43 am - 8:10 amSTL-LGW
16h 27m2 stops
American Airlines Logo
12:20 pm - 11:58 pmLGW-STL
17h 38m2 stops
$790American Airlines
Find Deal
mié., oct. 8 - lun., oct. 20

British Airways flights from St. Louis to London

Our best British Airways deals on St. Louis to London flight tickets
British Airways
Aug 20
STL1:15 pmLambert-St Louis
12h 40m
1 stop
LHR7:55 amLondon Heathrow
Aug 29
LHR6:10 amLondon Heathrow
20h 37m
2 stops
STL8:47 pmLambert-St Louis
British Airways
Aug 24
STL1:42 pmLambert-St Louis
11h 38m
1 stop
LHR7:20 amLondon Heathrow
Sep 5
LHR12:15 pmLondon Heathrow
14h 17m
1 stop
STL8:32 pmLambert-St Louis
British Airways
Aug 19
STL8:01 pmLambert-St Louis
10h 14m
1 stop
LHR12:15 pmLondon Heathrow
Aug 26
LHR1:10 pmLondon Heathrow
12h 11m
1 stop
STL7:21 pmLambert-St Louis

Virgin Atlantic flights from St. Louis to London

Our best Virgin Atlantic deals on St. Louis to London flight tickets
Virgin Atlantic
Aug 6
STL3:41 pmLambert-St Louis
15h 49m
1 stop
LHR1:30 pmLondon Heathrow
Aug 13
LHR6:15 amLondon Heathrow
15h 51m
2 stops
STL4:06 pmLambert-St Louis
Virgin Atlantic
Jul 22
STL3:41 pmLambert-St Louis
13h 44m
2 stops
LHR11:25 amLondon Heathrow
Jul 29
LHR10:55 amLondon Heathrow
15h 41m
2 stops
STL8:36 pmLambert-St Louis
Virgin Atlantic
Jul 23
STL1:29 pmLambert-St Louis
11h 16m
1 stop
LHR6:45 amLondon Heathrow
Jul 26
LHR12:25 pmLondon Heathrow
16h 55m
1 stop
STL11:20 pmLambert-St Louis

See travel insights to London from

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

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 typical price of a round-trip flight between St. Louis and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from St. Louis is in April. Flight prices, which tend to average around $761, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from St. Louis averaging around $767.

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from St. Louis to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $846. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $1,006. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

What is the cheapest time of day to depart on your flight to London?

Flying to London from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $915 when looking at flights departing in the morning. Flights to London are more costly at noon, with an average ticket price of $958. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $954 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from St. Louis for as low as $832 on momondo.

Can stopping save me money on St. Louis to London flights?

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to London flight.

How have St. Louis to London flight prices changed over time?

As of July 2025, prices for St. Louis to London flights are approximately 33% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to London

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

Cheap St. Louis to London (STL to LON) flight deals and tips

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

Best Price Found

$244

Fastest flight time

10h 14m

Direct flights

None

Airports in London

6 airports
The best one-way flight to London from St. Louis in the past 72 hours is $244. The best round-trip flight deal from St. Louis to London found on momondo in the last 72 hours is $489.
The fastest flight from St. Louis to London takes 10h 14m
There are no direct flights from St. Louis to London. Popular non-direct routes for this connection are Lambert-St Louis Airport - London Gatwick Airport, Lambert-St Louis Airport - London Stansted Airport and Lambert-St Louis Airport - London Heathrow Airport.
There are 6 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW), London Southend (SEN)

  • How far is Lambert-St Louis to London by plane?

    London is 4197.7 mi away from Lambert-St Louis. Flights usually cover this in 10h 14m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Lambert-St Louis Airport to London were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to London?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.

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

    The travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to London?


Best airlines flying from St. Louis to London

Compare and see reviews for airlines that fly from St. Louis to London with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $669Free CancellationRating
7.3
1,418 reviews
Search Scandinavian Airlines flights
IberiaPriceFrom $669Free CancellationRating
7.0
2,828 reviews
Search Iberia flights
American AirlinesPriceFrom $687Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom $691Free CancellationRating
7.1
9,695 reviews
Search Air Canada flights
United AirlinesPriceFrom $699Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights
British AirwaysPriceFrom $701Free CancellationRating
6.6
7,109 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $703Free CancellationRating
7.4
653 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $706Free CancellationRating
8.0
7,951 reviews
Search Delta flights
LufthansaPriceFrom $725Free CancellationRating
6.8
7,199 reviews
Search Lufthansa flights
KLMPriceFrom $726Free CancellationRating
7.8
1,372 reviews
Search KLM flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Croydon
Luton
Slough
Dover
Dartford
Guildford
Stansted
Hayes
Milton Keynes
Ilford
Colchester
Chelmsford
Canterbury
Watford
Richmond
Wembley
Dagenham
St. Albans

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to London for you.

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

momondo does allow users to show only those flights to London from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for St. Louis to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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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1 adult
mar. 7/15
mar. 7/22

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London