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Cheap flights from St. Louis to London Heathrow Airport from $336

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 Heathrow Airport departing on 3/8. 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.
1:00 pm - 4:00 pmSTL-LHR
21h 00m2 stops
7:30 pm - 11:38 pmLHR-STL
34h 08m2 stops
$719Scandinavian Airlines
Find Deal
Sat, Jan 18 - Tue, Jan 21
1:00 pm - 4:00 pmSTL-LHR
21h 00m2 stops
6:40 am - 11:38 pmLHR-STL
22h 58m2 stops
$720Scandinavian Airlines
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Fri, Feb 7 - Mon, Feb 10
4:30 pm - 10:50 amSTL-LHR
12h 20m1 stop
6:30 am - 1:55 pmLHR-STL
13h 25m1 stop
$779United Airlines
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Sun, Feb 23 - Fri, Mar 7
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
1:45 pm - 3:06 pmLHR-STL
55h 21m2 stops
$785Air Canada
Find Deal
Mon, Jan 13 - Mon, Jan 27
6:30 am - 11:15 amSTL-LHR
22h 45m1 stop
2:30 pm - 3:06 pmLHR-STL
30h 36m1 stop
$789United Airlines
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Tue, Jan 28 - Tue, Feb 4
10:16 am - 11:40 amSTL-LHR
19h 24m1 stop
7:00 am - 10:09 pmLHR-STL
21h 09m2 stops
$796Iberia
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Sun, Dec 29 - Tue, Jan 14
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
12:05 pm - 3:06 pmLHR-STL
57h 01m2 stops
$835Air Canada
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Mon, Dec 2 - Mon, Dec 9
12:49 pm - 7:20 amSTL-LHR
12h 31m1 stop
6:15 am - 10:05 pmLHR-STL
21h 50m2 stops
$836Iberia
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Tue, Dec 3 - Wed, Dec 11
2:30 pm - 6:50 amSTL-LHR
10h 20m1 stop
11:55 am - 5:58 pmLHR-STL
12h 03m1 stop
$840British Airways
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Tue, Dec 10 - Fri, Dec 27
12:01 pm - 6:20 amSTL-LHR
12h 19m1 stop
7:40 pm - 9:40 pmLHR-STL
31h 00m2 stops
$874British Airways
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Thu, Mar 6 - Wed, Mar 12
12:15 pm - 12:50 pmSTL-LHR
42h 35m3 stops
Sat, Mar 8
4:00 pm - 4:00 pmSTL-LHR
19h 00m2 stops
$364Scandinavian Airlines
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Mon, Mar 24
1:09 pm - 4:00 pmSTL-LHR
20h 51m2 stops
$365Scandinavian Airlines
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Wed, Nov 13
1:39 pm - 7:20 amSTL-LHR
12h 41m1 stop
$453Iberia
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Mon, Mar 24
2:54 pm - 6:50 amSTL-LHR
10h 56m1 stop
$454British Airways
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Sun, Mar 23
3:50 pm - 6:30 amSTL-LHR
32h 40m1 stop
$456Air Canada
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Sat, Feb 15
10:16 am - 8:15 amSTL-LHR
15h 59m1 stop
$472Iberia
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Sun, Jan 5
6:25 am - 6:40 amSTL-LHR
18h 15m2 stops
$478United Airlines
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Sun, Jan 5
5:00 am - 8:30 amSTL-LHR
21h 30m2 stops
$584United Airlines
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Thu, Dec 26
12:45 pm - 12:05 pmSTL-LHR
17h 20m2 stops
$2,527British Airways
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Wed, Feb 5
12:58 pm - 5:40 pmSTL-LHR
22h 42m2 stops
6:40 am - 8:32 pmLHR-STL
19h 52m2 stops
$925Scandinavian Airlines
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Sat, Nov 9 - Sat, Nov 16
12:58 pm - 4:00 pmSTL-LHR
21h 02m2 stops
6:40 am - 9:04 pmLHR-STL
20h 24m2 stops
$976Scandinavian Airlines
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Sat, Nov 9 - Fri, Dec 6
12:58 pm - 4:00 pmSTL-LHR
21h 02m2 stops
9:05 pm - 9:04 pmLHR-STL
29h 59m3 stops
$1,118Scandinavian Airlines
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Sat, Nov 9 - Sun, Dec 8
5:40 pm - 9:55 amSTL-LHR
34h 15m2 stops
10:35 pm - 3:34 pmLHR-STL
22h 59m2 stops
$1,241Turkish Airlines
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Sat, Nov 9 - Sun, Dec 8
1:55 pm - 8:15 amSTL-LHR
12h 20m1 stop
7:20 am - 9:53 pmLHR-STL
20h 33m2 stops
$1,654Iberia
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Sat, Nov 9 - Fri, Dec 6
12:52 pm - 7:20 amSTL-LHR
12h 28m1 stop
7:20 am - 10:13 pmLHR-STL
20h 53m2 stops
$1,656Iberia
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Sun, Nov 10 - Sun, Dec 8
1:05 pm - 7:55 amSTL-LHR
12h 50m1 stop
1:30 pm - 1:55 pmLHR-STL
30h 25m1 stop
$1,716United Airlines
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Fri, Nov 8 - Sat, Nov 16
5:31 pm - 12:05 pmSTL-LHR
12h 34m1 stop
12:45 pm - 8:59 pmLHR-STL
38h 14m2 stops
$1,768British Airways
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Sun, Nov 10 - Sun, Dec 1
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
11:10 am - 3:06 pmLHR-STL
33h 56m1 stop
$1,771Air Canada
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Thu, Nov 7 - Mon, Nov 11
3:53 pm - 8:15 amSTL-LHR
10h 22m1 stop
8:20 am - 4:37 pmLHR-STL
14h 17m1 stop
$1,781British Airways
Find Deal
Sun, Nov 10 - Sat, Nov 30

Lufthansa flights from St. Louis to London Heathrow Airport

Our best Lufthansa deals on St. Louis to London Heathrow Airport flight tickets
Lufthansa
Dec 29
STL8:25 amLambert-St Louis
16h 15m
1 stop
LHR6:40 amLondon Heathrow
Jan 14
LHR4:00 pmLondon Heathrow
13h 30m
1 stop
STL11:30 pmLambert-St Louis
Lufthansa
Apr 6
STL5:18 pmLambert-St Louis
20h 22m
2 stops
LHR7:40 pmLondon Heathrow
Apr 12
LHR5:50 pmLondon Heathrow
27h 31m
2 stops
STL3:21 pmLambert-St Louis
Lufthansa
Apr 11
STL3:30 pmLambert-St Louis
12h 10m
1 stop
LHR9:40 amLondon Heathrow
Apr 27
LHR6:30 amLondon Heathrow
13h 00m
1 stop
STL1:30 pmLambert-St Louis

Air Canada flights from St. Louis to London Heathrow Airport

Our best Air Canada deals on St. Louis to London Heathrow Airport flight tickets
Air Canada
Jan 13
STL3:50 pmLambert-St Louis
10h 40m
1 stop
LHR8:30 amLondon Heathrow
Jan 27
LHR1:45 pmLondon Heathrow
55h 21m
2 stops
STL3:06 pmLambert-St Louis
Air Canada
Dec 2
STL3:50 pmLambert-St Louis
10h 40m
1 stop
LHR8:30 amLondon Heathrow
Dec 9
LHR12:05 pmLondon Heathrow
57h 01m
2 stops
STL3:06 pmLambert-St Louis
Air Canada
Dec 3
STL3:50 pmLambert-St Louis
10h 40m
1 stop
LHR8:30 amLondon Heathrow
Dec 13
LHR6:00 pmLondon Heathrow
27h 06m
1 stop
STL3:06 pmLambert-St Louis

How to get the cheapest flight ticket from St. Louis to London Heathrow 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 month to fly from St. Louis to London Heathrow Airport?

February. The cheapest time of year to fly to London Heathrow Airport from St. Louis is February. Most expensive is June

What is the cheapest day to depart St. Louis for London Heathrow Airport?

Thursday. The cheapest day of the week is typically Thursday. The most expensive is typically Friday

When is the cheapest time to fly from St. Louis to London Heathrow Airport?

In the evening. St. Louis to London Heathrow Airport flights are approximately 12% more expensive in the morning than in the evening

What is the cheapest airline that flies to London Heathrow Airport from St. Louis?

Iberia. Iberia, Virgin Atlantic, and United Airlines are the most popular carriers operating from St. Louis to London Heathrow Airport

How far in advance should you book St. Louis to London Heathrow Airport flights?

49 days before. The cheapest time to buy a flight from St. Louis to London Heathrow Airport is approximately 49 days to departure

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

You could potentially save up to 39% on your flight if you consider stops on a St. Louis to London Heathrow Airport flight.

When to book flights from St. Louis to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to London Heathrow 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 Heathrow Airport (STL to LHR) flight deals and tips

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

Best Price Found

$336

Fastest flight time

10h 20m

Direct flights

None
The best one-way flight to London Heathrow Airport from St. Louis in the past 72 hours is $336. The best round-trip flight deal from St. Louis to London Heathrow Airport found on momondo in the last 72 hours is $719.
The fastest flight from St. Louis to London Heathrow Airport takes 10h 20m
There are no direct flights from St. Louis to London Heathrow Airport. Popular non-direct route for this connection is Lambert-St Louis Airport - London Heathrow Airport.

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

    Lambert-St Louis and London Heathrow are 4185.8 mi apart from one another. By plane, this route typically takes 10h 20m.

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

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

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

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

    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 Heathrow Airport.

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

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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


Best airlines flying from St. Louis to London Heathrow Airport

Compare and see reviews for airlines that fly from St. Louis to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $490Free CancellationRating
7.8
1,350 reviews
Search KLM flights
United AirlinesPriceFrom $587Free CancellationRating
7.4
9,226 reviews
Search United Airlines flights
IberiaPriceFrom $595Free CancellationRating
7.0
2,668 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $624Free CancellationRating
7.6
666 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $652Free CancellationRating
6.7
6,840 reviews
Search British Airways flights
DeltaPriceFrom $659Free CancellationRating
8.0
8,829 reviews
Search Delta flights
American AirlinesPriceFrom $659Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom $694Free CancellationRating
7.0
8,130 reviews
Search Air Canada flights
Air FrancePriceFrom $769Free CancellationRating
7.4
1,530 reviews
Search Air France flights
LufthansaPriceFrom $802Free CancellationRating
6.8
7,165 reviews
Search Lufthansa flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from St. Louis.

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

Flights from St. Louis to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential St. Louis to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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.


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