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Cheap flights from St. Louis to London from £246

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 1/4. 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 return flights

These are some of the best return 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 stopovers.

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.
17:05 - 13:10STL-LHR
14h 05m1 stop
10:50 - 23:31LHR-STL
18h 41m2 stops
Sat, 18 Jan - Fri, 31 Jan
13:00 - 17:40STL-LHR
23h 40m2 stops
06:40 - 23:38LHR-STL
21h 58m2 stops
£546Scandinavian Airlines
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Mon, 17 Mar - Wed, 26 Mar
14:10 - 13:25STL-LHR
17h 15m2 stops
07:00 - 22:09LHR-STL
21h 09m2 stops
£562British Airways
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Tue, 4 Feb - Tue, 11 Feb
13:00 - 16:25STL-LHR
22h 25m3 stops
06:40 - 23:38LHR-STL
21h 58m2 stops
£574Scandinavian Airlines
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Wed, 19 Mar - Wed, 26 Mar
11:38 - 13:25STL-LHR
19h 47m2 stops
17:25 - 22:09LHR-STL
34h 44m2 stops
£576British Airways
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Tue, 28 Jan - Tue, 4 Feb
09:36 - 07:30STL-LGW
15h 54m2 stops
11:20 - 23:46LGW-STL
18h 26m2 stops
£587American Airlines
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Tue, 21 Jan - Tue, 28 Jan
18:03 - 20:35STL-LHR
20h 32m1 stop
06:30 - 13:55LHR-STL
13h 25m1 stop
£593United Airlines
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Sat, 18 Jan - Fri, 31 Jan
06:30 - 11:15STL-LHR
22h 45m1 stop
14:30 - 15:06LHR-STL
30h 36m1 stop
£602United Airlines
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Tue, 21 Jan - Tue, 28 Jan
06:04 - 07:05STL-LHR
19h 01m1 stop
09:10 - 23:14LHR-STL
20h 04m1 stop
£799Virgin Atlantic
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Sun, 5 Jan - Sun, 12 Jan
06:04 - 07:05STL-LHR
19h 01m1 stop
12:20 - 23:14LHR-STL
16h 54m2 stops
£908Virgin Atlantic
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Sun, 5 Jan - Sun, 12 Jan
16:57 - 10:00STL-LGW
35h 03m1 stop
Tue, 1 Apr
17:35 - 16:25STL-LCY
16h 50m2 stops
£329Lufthansa
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Tue, 1 Apr
14:15 - 10:25STL-LHR
14h 10m2 stops
£364American Airlines
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Tue, 4 Feb
08:00 - 10:00STL-LHR
20h 00m2 stops
£367Air Canada
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Tue, 1 Apr
09:39 - 06:30STL-LHR
14h 51m2 stops
£406Air Canada
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Fri, 18 Apr
14:05 - 06:35STL-LHR
11h 30m1 stop
£407American Airlines
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Fri, 14 Mar
14:13 - 19:55STL-LHR
24h 42m2 stops
£422British Airways
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Fri, 14 Mar
08:25 - 11:05STL-LHR
20h 40m1 stop
£435United Airlines
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Sun, 5 Jan
13:30 - 06:30STL-LHR
11h 00m1 stop
£465United Airlines
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Fri, 16 May
17:27 - 18:30STL-LCY
44h 03m2 stops
£486British Airways
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Fri, 14 Mar
15:24 - 17:40STL-LHR
20h 16m2 stops
06:40 - 23:37LHR-STL
22h 57m2 stops
£660Scandinavian Airlines
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Mon, 23 Dec - Wed, 15 Jan
12:55 - 18:30STL-LHR
23h 35m2 stops
06:40 - 23:40LHR-STL
23h 00m2 stops
£957Scandinavian Airlines
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Mon, 23 Dec - Mon, 30 Dec
18:49 - 09:35STL-LHR
32h 46m1 stop
14:50 - 19:31LHR-STL
34h 41m2 stops
£1,068
Find Deal
Mon, 23 Dec - Wed, 15 Jan
18:49 - 09:35STL-LHR
32h 46m1 stop
14:50 - 23:27LHR-STL
38h 37m2 stops
£1,137
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Mon, 23 Dec - Tue, 14 Jan
15:54 - 08:15STL-LHR
10h 21m1 stop
10:40 - 22:56LHR-STL
18h 16m1 stop
£1,331British Airways
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Mon, 23 Dec - Wed, 15 Jan
11:36 - 09:40STL-LHR
16h 04m1 stop
10:40 - 19:30LHR-STL
14h 50m1 stop
£1,353British Airways
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Tue, 24 Dec - Tue, 14 Jan
09:53 - 10:35STL-LHR
18h 42m1 stop
06:30 - 18:47LHR-STL
18h 17m2 stops
£1,395Virgin Atlantic
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Tue, 24 Dec - Tue, 31 Dec
10:13 - 07:05STL-LHR
14h 52m2 stops
06:30 - 18:47LHR-STL
18h 17m2 stops
£1,398Virgin Atlantic
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Tue, 24 Dec - Tue, 31 Dec
05:00 - 11:15STL-LHR
24h 15m1 stop
18:00 - 15:06LHR-STL
27h 06m1 stop
£1,494United Airlines
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Tue, 24 Dec - Mon, 30 Dec
06:25 - 07:55STL-LHR
19h 30m1 stop
15:00 - 15:47LHR-STL
30h 47m2 stops
£1,557United Airlines
Find Deal
Thu, 26 Dec - Thu, 2 Jan

United Airlines flights from St. Louis to London

Our best United Airlines deals on St. Louis to London flight tickets
United Airlines
18 Jan
STL18:03Lambert-St Louis
20h 32m
1 stop
LHR20:35London Heathrow
31 Jan
LHR06:30London Heathrow
13h 25m
1 stop
STL13:55Lambert-St Louis
United Airlines
21 Jan
STL06:30Lambert-St Louis
22h 45m
1 stop
LHR11:15London Heathrow
28 Jan
LHR14:30London Heathrow
30h 36m
1 stop
STL15:06Lambert-St Louis
United Airlines
4 Feb
STL11:30Lambert-St Louis
13h 40m
2 stops
LHR07:10London Heathrow
11 Feb
LHR07:30London Heathrow
18h 32m
2 stops
STL20:02Lambert-St Louis

Air Canada flights from St. Louis to London

Our best Air Canada deals on St. Louis to London flight tickets
Air Canada
13 May
STL13:30Lambert-St Louis
11h 00m
1 stop
LHR06:30London Heathrow
5 Jun
LHR06:50London Heathrow
14h 26m
2 stops
STL15:16Lambert-St Louis
Air Canada
20 May
STL13:30Lambert-St Louis
14h 30m
1 stop
LHR10:00London Heathrow
5 Jun
LHR06:50London Heathrow
14h 26m
2 stops
STL15:16Lambert-St Louis
Air Canada
17 Apr
STL15:50Lambert-St Louis
14h 00m
1 stop
LHR11:50London Heathrow
7 May
LHR06:50London Heathrow
19h 11m
2 stops
STL20:01Lambert-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 £577, 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 £599.

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

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £611. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to London for around £1,008.

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

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £647. Flights in the evening are often more expensive, with an average ticket price of £1,159.

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

In general, most travellers find the cheapest time to book a flight to London is about 55 days prior to their departure date, when tickets on average are £736. 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 £449 on momondo.

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

You could potentially save up to 25% 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 return 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

£246

Fastest flight time

9h 55m

Direct flights

None

Airports in London

6 airports
The best one-way flight to London from St. Louis in the past 72 hours is £246. The best return flight deal from St. Louis to London found on momondo in the last 72 hours is £509.
The fastest flight from St. Louis to London takes 9h 55m
There are no direct flights from St. Louis to London. Popular non-direct routes for this connection are Lambert-St Louis Airport - London City 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. A reasonable flight in good conditions will take 9h 55m.

  • 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 £513Free CancellationRating
7.8
1,345 reviews
Search KLM flights
British AirwaysPriceFrom £530Free CancellationRating
6.6
6,810 reviews
Search British Airways flights
United AirlinesPriceFrom £542Free CancellationRating
7.4
9,022 reviews
Search United Airlines flights
American AirlinesPriceFrom £549Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Virgin AtlanticPriceFrom £552Free CancellationRating
7.5
667 reviews
Search Virgin Atlantic flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to London . Millions of users trust and use momondo every year so you are in good hands.

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?

momondo provides multiple filters to help you find the best flight to London from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London