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Cheap flights from St. Louis to London from $274

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 2/2. 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

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to London that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to London.

Cheap last minute flights

Planning a quick getaway from St. Louis to London? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to London, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to London

Find recent round-trip train or bus tickets from St. Louis to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
5:20 pm - 10:00 amSTL-LGW
34h 40m1 stop
2:00 pm - 2:42 pmLGW-STL
30h 42m2 stops
Wed, Feb 19 - Mon, Feb 24
5:05 pm - 12:40 pmSTL-LHR
13h 35m1 stop
10:50 am - 11:31 pmLHR-STL
18h 41m2 stops
Mon, Jan 13 - Thu, Jan 30
11:04 am - 7:55 amSTL-LHR
14h 51m1 stop
11:30 am - 11:36 pmLHR-STL
18h 06m2 stops
$740Virgin Atlantic
Find Deal
Sun, Feb 9 - Tue, Feb 25
4:40 pm - 10:35 amSTL-LHR
11h 55m1 stop
12:20 pm - 9:49 pmLHR-STL
15h 29m1 stop
$755Virgin Atlantic
Find Deal
Sun, Jan 19 - Tue, Feb 4
9:39 am - 6:30 amSTL-LHR
14h 51m2 stops
6:30 am - 1:30 pmLHR-STL
13h 00m1 stop
$802United Airlines
Find Deal
Tue, Apr 1 - Wed, Apr 16
9:39 am - 6:30 amSTL-LHR
14h 51m2 stops
6:50 am - 2:59 pmLHR-STL
14h 09m2 stops
$806Air Canada
Find Deal
Tue, Apr 1 - Wed, Apr 16
2:13 pm - 1:45 pmSTL-LCY
18h 32m2 stops
8:40 am - 8:48 pmLCY-STL
17h 08m2 stops
$813British Airways
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Wed, Mar 19 - Wed, Mar 26
6:23 pm - 10:20 amSTL-LHR
9h 57m1 stop
9:35 am - 4:15 pmLHR-STL
12h 40m1 stop
$814British Airways
Find Deal
Tue, May 6 - Wed, May 14
7:05 am - 7:10 amSTL-LHR
18h 05m2 stops
11:10 am - 7:50 pmLHR-STL
37h 40m2 stops
$818United Airlines
Find Deal
Tue, Feb 25 - Mon, Mar 10
9:40 am - 6:30 amSTL-LHR
14h 50m2 stops
2:05 pm - 2:18 pmLHR-STL
30h 13m2 stops
$907Air Canada
Find Deal
Fri, May 9 - Fri, Jun 20
5:05 pm - 10:00 amSTL-LGW
34h 55m1 stop
Sun, Feb 2
8:22 am - 10:50 amSTL-LHR
20h 28m2 stops
Sun, Feb 2
8:22 am - 10:55 amSTL-LGW
20h 33m2 stops
Sun, Feb 2
2:10 pm - 4:25 pmSTL-LCY
20h 15m2 stops
$502British Airways
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Wed, Jan 15
2:13 pm - 1:45 pmSTL-LCY
18h 32m2 stops
$505British Airways
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Sun, Mar 16
1:30 pm - 10:00 amSTL-LHR
14h 30m1 stop
$511United Airlines
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Thu, May 1
1:30 pm - 8:35 amSTL-LHR
37h 05m2 stops
$524Air Canada
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Tue, May 13
7:30 am - 7:25 amSTL-LGW
17h 55m2 stops
$547American Airlines
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Tue, Dec 31
3:50 pm - 6:30 amSTL-LHR
32h 40m1 stop
$548Air Canada
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Sun, Jan 5
3:44 pm - 12:30 pmSTL-LCY
14h 46m2 stops
$554United Airlines
Find Deal
Thu, May 1
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
8:55 am - 3:06 pmLHR-STL
36h 11m2 stops
$1,681
Find Deal
Sun, Dec 22 - Tue, Dec 31
10:35 am - 11:15 amSTL-LHR
18h 40m1 stop
8:55 am - 7:57 pmLHR-STL
17h 02m2 stops
$1,686United Airlines
Find Deal
Sun, Dec 22 - Wed, Jan 1
5:59 pm - 11:05 amSTL-LHR
35h 06m1 stop
2:30 pm - 3:06 pmLHR-STL
30h 36m1 stop
$1,689United Airlines
Find Deal
Sun, Dec 22 - Tue, Dec 31
6:25 am - 6:30 amSTL-LHR
18h 05m2 stops
2:30 pm - 2:24 pmLHR-STL
29h 54m2 stops
$1,711Air Canada
Find Deal
Sun, Dec 22 - Tue, Dec 31
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
11:10 am - 3:06 pmLHR-STL
33h 56m1 stop
$1,767Air Canada
Find Deal
Fri, Dec 20 - Tue, Dec 31
5:29 pm - 10:50 amSTL-LCY
35h 21m2 stops
6:55 pm - 8:22 pmLCY-STL
31h 27m2 stops
$2,583British Airways
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Sun, Dec 22 - Wed, Jan 1
7:15 am - 10:35 amSTL-LHR
21h 20m1 stop
4:10 pm - 9:08 amLHR-STL
22h 58m1 stop
$2,654Delta
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Fri, Dec 20 - Sat, Jan 4
2:27 pm - 7:00 amSTL-LHR
10h 33m1 stop
1:30 pm - 12:01 amLHR-STL
16h 31m1 stop
$2,852American Airlines
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Fri, Dec 20 - Sat, Dec 21
3:29 pm - 1:15 pmSTL-LCY
15h 46m2 stops
9:20 am - 10:06 pmLCY-STL
18h 46m2 stops
$3,843Delta
Find Deal
Sat, Dec 21 - Fri, Jan 3
2:27 pm - 7:00 amSTL-LHR
10h 33m1 stop
3:45 pm - 10:19 pmLHR-STL
12h 34m1 stop
$16,174American Airlines
Find Deal
Sat, Dec 21 - Tue, Dec 31

Virgin Atlantic flights from St. Louis to London

Our best Virgin Atlantic deals on St. Louis to London flight tickets
Virgin Atlantic
Feb 9
STL11:04 amLambert-St Louis
14h 51m
1 stop
LHR7:55 amLondon Heathrow
Feb 25
LHR11:30 amLondon Heathrow
18h 06m
2 stops
STL11:36 pmLambert-St Louis
Virgin Atlantic
Jan 19
STL4:40 pmLambert-St Louis
11h 55m
1 stop
LHR10:35 amLondon Heathrow
Feb 4
LHR12:20 pmLondon Heathrow
15h 29m
1 stop
STL9:49 pmLambert-St Louis
Virgin Atlantic
Jan 19
STL12:00 pmLambert-St Louis
14h 45m
2 stops
LHR8:45 amLondon Heathrow
Feb 4
LHR10:00 amLondon Heathrow
17h 49m
2 stops
STL9:49 pmLambert-St Louis

Scandinavian Airlines flights from St. Louis to London

Our best Scandinavian Airlines deals on St. Louis to London flight tickets
Scandinavian Airlines
Mar 17
STL1:00 pmLambert-St Louis
24h 30m
2 stops
LHR6:30 pmLondon Heathrow
Mar 26
LHR6:40 amLondon Heathrow
21h 58m
2 stops
STL11:38 pmLambert-St Louis
Scandinavian Airlines
Mar 19
STL1:00 pmLambert-St Louis
24h 30m
2 stops
LHR6:30 pmLondon Heathrow
Mar 26
LHR6:40 amLondon Heathrow
21h 58m
2 stops
STL11:38 pmLambert-St Louis
Scandinavian Airlines
Feb 9
STL2:00 pmLambert-St Louis
20h 00m
2 stops
LHR4:00 pmLondon Heathrow
Feb 25
LHR6:40 pmLondon Heathrow
34h 56m
2 stops
STL11:36 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 February. Flight prices, which tend to average around $725, are often lower during this time because this is during the off-season. The month of April is another great option to travel to London, with average flight prices from St. Louis averaging around $753.

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?

Most flyers found that booking tickets 55 days in advance of their planned departure date is the best time to get cheap flights to London. During this timeframe, flight prices are around $921. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $710.

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

You could potentially save up to 6% 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 December 2024, prices for St. Louis to London flights are approximately 31% more expensive 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

$274

Fastest flight time

9h 57m

Direct flights

None

Airports in London

6 airports
The best one-way flight to London from St. Louis in the past 72 hours is $274. The best round-trip flight deal from St. Louis to London found on momondo in the last 72 hours is $615.
The fastest flight from St. Louis to London takes 9h 57m
There are no direct flights from St. Louis to London. Popular non-direct routes for this connection are Lambert-St Louis Airport - London Luton Airport, Lambert-St Louis Airport - London Gatwick 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 9h 57m, 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
KLMPriceFrom $490Free CancellationRating
7.8
1,349 reviews
Search KLM flights
IberiaPriceFrom $631Free CancellationRating
7.0
2,656 reviews
Search Iberia flights
American AirlinesPriceFrom $635Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Virgin AtlanticPriceFrom $654Free CancellationRating
7.5
668 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $655Free CancellationRating
6.6
6,820 reviews
Search British Airways flights
United AirlinesPriceFrom $673Free CancellationRating
7.4
9,055 reviews
Search United Airlines flights
DeltaPriceFrom $679Free CancellationRating
8.0
8,604 reviews
Search Delta flights
Air CanadaPriceFrom $716Free CancellationRating
7.0
8,382 reviews
Search Air Canada flights
Air FrancePriceFrom $769Free CancellationRating
7.4
1,504 reviews
Search Air France flights
LufthansaPriceFrom $802Free CancellationRating
6.8
7,091 reviews
Search Lufthansa flights

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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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