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Cheap flights from St. Louis to London from $339

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 1/8. 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.
6:46 pm - 10:35 amSTL-LGW
33h 49m2 stops
2:00 pm - 11:31 pmLGW-STL
15h 31m1 stop
Mon, Jan 13 - Thu, Jan 23
5:02 pm - 10:00 amSTL-LGW
34h 58m1 stop
2:00 pm - 10:46 pmLGW-STL
14h 46m1 stop
Wed, Dec 4 - Sat, Dec 7
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
2:30 pm - 12:16 pmLHR-STL
27h 46m2 stops
$761Air Canada
Find Deal
Mon, Jan 13 - Wed, Jan 29
2:55 pm - 11:15 amSTL-LHR
14h 20m1 stop
6:30 am - 1:55 pmLHR-STL
13h 25m1 stop
$779United Airlines
Find Deal
Wed, Jan 29 - Fri, Feb 7
1:30 pm - 12:20 pmSTL-LHR
16h 50m1 stop
6:30 am - 1:30 pmLHR-STL
13h 00m1 stop
$782United Airlines
Find Deal
Tue, Apr 22 - Fri, May 2
9:40 am - 6:30 amSTL-LHR
14h 50m2 stops
6:50 am - 7:43 pmLHR-STL
18h 53m2 stops
$792Air Canada
Find Deal
Sun, May 4 - Wed, May 14
6:25 pm - 6:55 amSTL-LHR
30h 30m1 stop
7:35 pm - 8:04 pmLHR-STL
30h 29m2 stops
$825British Airways
Find Deal
Sat, Apr 5 - Mon, Apr 14
1:36 pm - 7:20 amSTL-LHR
11h 44m1 stop
2:10 pm - 10:19 pmLHR-STL
14h 09m1 stop
$893British Airways
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Fri, Dec 13 - Fri, Dec 27
5:45 am - 7:30 amSTL-LGW
19h 45m2 stops
11:20 am - 8:54 amLGW-STL
27h 34m2 stops
$958American Airlines
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Tue, Dec 3 - Fri, Dec 13
6:16 am - 8:05 amSTL-LGW
19h 49m2 stops
11:20 am - 8:54 amLGW-STL
27h 34m2 stops
$1,058American Airlines
Find Deal
Sat, Dec 7 - Sat, Dec 14
12:15 pm - 10:50 amSTL-LHR
16h 35m3 stops
Wed, Jan 8
1:00 pm - 10:50 amSTL-LHR
39h 50m3 stops
Sat, Feb 22
9:29 pm - 10:35 amSTL-LGW
31h 06m1 stop
Mon, Dec 30
3:50 pm - 6:30 amSTL-LHR
32h 40m1 stop
$439Air Canada
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Sat, Feb 22
3:50 pm - 8:35 pmSTL-LHR
22h 45m2 stops
$440Air Canada
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Sat, Feb 22
3:50 pm - 6:30 amSTL-LHR
32h 40m1 stop
$456United Airlines
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Sat, Feb 22
8:00 am - 7:55 amSTL-LHR
17h 55m1 stop
$502United Airlines
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Sun, Jan 5
10:21 am - 7:05 amSTL-LHR
14h 44m1 stop
$573Virgin Atlantic
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Thu, Dec 12
2:10 pm - 10:15 amSTL-LHR
14h 05m2 stops
$2,728British Airways
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Wed, Feb 5
5:35 pm - 11:30 amSTL-LHR
11h 55m1 stop
$12,203British Airways
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Fri, Dec 6
1:09 pm - 4:00 pmSTL-LHR
20h 51m2 stops
6:40 am - 11:41 pmLHR-STL
23h 01m2 stops
$1,092Scandinavian Airlines
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Fri, Nov 22 - Fri, Nov 29
1:00 pm - 1:25 pmSTL-LHR
18h 25m3 stops
9:50 am - 11:30 amLHR-STL
31h 40m3 stops
$1,139
Find Deal
Sun, Nov 24 - Tue, Nov 26
1:00 pm - 5:30 pmSTL-LHR
22h 30m3 stops
12:15 pm - 11:30 amLHR-STL
29h 15m3 stops
$1,427
Find Deal
Sun, Nov 24 - Tue, Nov 26
1:34 pm - 9:35 amSTL-LHR
14h 01m1 stop
7:35 am - 8:34 amLHR-STL
30h 59m2 stops
$1,503
Find Deal
Sun, Nov 24 - Tue, Nov 26
12:50 pm - 4:00 pmSTL-LHR
21h 10m2 stops
6:40 am - 9:03 pmLHR-STL
20h 23m2 stops
$1,532Scandinavian Airlines
Find Deal
Sat, Nov 23 - Sat, Nov 30
11:51 am - 6:20 amSTL-LHR
12h 29m1 stop
8:20 am - 8:59 pmLHR-STL
18h 39m2 stops
$1,825British Airways
Find Deal
Tue, Nov 26 - Sun, Dec 1
5:30 pm - 10:15 amSTL-LHR
10h 45m1 stop
6:30 am - 5:15 pmLHR-STL
16h 45m2 stops
$2,175United Airlines
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Sun, Nov 24 - Fri, Nov 29
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
6:00 pm - 3:06 pmLHR-STL
27h 06m1 stop
$2,222Air Canada
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Sun, Nov 24 - Sun, Dec 1
3:50 pm - 6:30 amSTL-LHR
32h 40m1 stop
6:00 pm - 3:06 pmLHR-STL
27h 06m1 stop
$2,247Air Canada
Find Deal
Tue, Nov 26 - Sun, Dec 1
11:35 am - 10:15 amSTL-LGW
16h 40m2 stops
11:00 am - 8:24 pmLGW-STL
39h 24m2 stops
$2,426Iberia
Find Deal
Tue, Nov 26 - Sun, Dec 1

Scandinavian Airlines flights from St. Louis to London

Our best Scandinavian Airlines deals on St. Louis to London flight tickets
Scandinavian Airlines
Feb 2
STL11:09 amLambert-St Louis
25h 21m
2 stops
LHR6:30 pmLondon Heathrow
Feb 16
LHR7:30 pmLondon Heathrow
34h 08m
2 stops
STL11:38 pmLambert-St Louis
Scandinavian Airlines
Feb 19
STL12:52 pmLambert-St Louis
21h 08m
2 stops
LHR4:00 pmLondon Heathrow
Feb 24
LHR6:40 amLondon Heathrow
22h 58m
2 stops
STL11:38 pmLambert-St Louis
Scandinavian Airlines
Jan 13
STL2:00 pmLambert-St Louis
25h 40m
2 stops
LHR9:40 pmLondon Heathrow
Jan 29
LHR6:40 amLondon Heathrow
22h 57m
2 stops
STL11:37 pmLambert-St Louis

Air Canada flights from St. Louis to London

Our best Air Canada deals on St. Louis to London flight tickets
Air Canada
Jan 13
STL3:50 pmLambert-St Louis
10h 40m
1 stop
LHR8:30 amLondon Heathrow
Jan 29
LHR2:30 pmLondon Heathrow
27h 46m
2 stops
STL12:16 pmLambert-St Louis
Air Canada
May 4
STL9:40 amLambert-St Louis
14h 50m
2 stops
LHR6:30 amLondon Heathrow
May 14
LHR6:50 amLondon Heathrow
18h 53m
2 stops
STL7:43 pmLambert-St Louis
Air Canada
May 12
STL1:30 pmLambert-St Louis
16h 20m
2 stops
LHR11:50 amLondon Heathrow
May 21
LHR6:50 amLondon Heathrow
18h 53m
2 stops
STL7:43 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 $718, 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 $740.

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 $825. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $993. 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 afternoon is the least expensive time of day to depart. momondo users have found prices as low as $913 when looking at flights departing in the afternoon. Flights to London are more costly at noon, with an average ticket price of $953. 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 2 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 $663.

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

You could potentially save up to 20% 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 November 2024, prices for St. Louis to London flights are approximately 1% 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

$339

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 $339. The best round-trip flight deal from St. Louis to London found on momondo in the last 72 hours is $534.
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 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 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
IberiaPriceFrom $617Free CancellationRating
7.0
2,661 reviews
Search Iberia flights
American AirlinesPriceFrom $635Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $653Free CancellationRating
6.6
6,831 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $654Free CancellationRating
7.5
663 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $663Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
DeltaPriceFrom $664Free CancellationRating
8.0
8,755 reviews
Search Delta flights
KLMPriceFrom $707Free CancellationRating
7.8
1,349 reviews
Search KLM flights
Air CanadaPriceFrom $716Free CancellationRating
7.0
8,246 reviews
Search Air Canada flights
Air FrancePriceFrom $769Free CancellationRating
7.4
1,525 reviews
Search Air France flights
LufthansaPriceFrom $802Free CancellationRating
6.8
7,143 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