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Cheap flights from St. Louis to London Heathrow Airport from $301

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 3/5. 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.
2:00 pm - 4:00 pmSTL-LHR
20h 00m2 stops
6:40 am - 11:37 pmLHR-STL
22h 57m2 stops
$681Scandinavian Airlines
Find Deal
Wed, Feb 5 - Mon, Feb 10
2:00 pm - 9:40 pmSTL-LHR
25h 40m2 stops
6:40 am - 11:37 pmLHR-STL
22h 57m2 stops
$687Scandinavian Airlines
Find Deal
Mon, Feb 3 - Mon, Feb 10
11:39 am - 6:20 amSTL-LHR
13h 41m1 stop
2:10 pm - 9:40 pmLHR-STL
12h 30m1 stop
$713Iberia
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Sun, Mar 16 - Wed, Mar 26
6:00 pm - 12:10 pmSTL-LHR
12h 10m1 stop
9:15 am - 2:35 pmLHR-STL
11h 20m1 stop
$716British Airways
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Tue, Apr 22 - Wed, May 7
1:45 pm - 9:40 amSTL-LHR
13h 55m1 stop
6:30 am - 1:55 pmLHR-STL
13h 25m1 stop
$719United Airlines
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Mon, Jan 27 - Wed, Feb 5
4:15 pm - 12:10 pmSTL-LHR
13h 55m1 stop
6:15 am - 11:23 pmLHR-STL
23h 08m2 stops
$720British Airways
Find Deal
Tue, Apr 22 - Wed, May 7
1:12 pm - 6:20 amSTL-LHR
11h 08m1 stop
6:30 am - 1:30 pmLHR-STL
13h 00m1 stop
$721United Airlines
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Wed, Apr 16 - Fri, Apr 25
3:50 pm - 11:50 amSTL-LHR
15h 00m1 stop
1:45 pm - 3:06 pmLHR-STL
54h 21m2 stops
$724Air Canada
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Tue, Mar 11 - Mon, Mar 17
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
6:00 pm - 3:06 pmLHR-STL
27h 06m1 stop
$740Air Canada
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Tue, Feb 4 - Tue, Feb 11
6:23 pm - 10:30 amSTL-LHR
10h 07m1 stop
2:25 pm - 11:23 pmLHR-STL
14h 58m1 stop
$804Iberia
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Tue, May 13 - Wed, Jun 4
7:04 pm - 12:50 pmSTL-LHR
35h 46m3 stops
Wed, Mar 5
11:08 pm - 12:50 pmSTL-LHR
55h 42m3 stops
Mon, Mar 3
10:49 am - 12:05 pmSTL-LHR
19h 16m1 stop
$456British Airways
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Tue, Feb 18
7:25 pm - 12:10 pmSTL-LHR
10h 45m1 stop
$459British Airways
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Wed, Apr 23
9:29 am - 6:20 amSTL-LHR
14h 51m1 stop
$463Iberia
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Mon, Feb 17
4:36 pm - 10:10 amSTL-LHR
35h 34m2 stops
$468United Airlines
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Tue, Jan 21
4:36 pm - 11:05 amSTL-LHR
12h 29m1 stop
$473United Airlines
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Tue, Jan 21
2:05 pm - 6:35 amSTL-LHR
11h 30m1 stop
$513American Airlines
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Fri, Mar 14
1:40 pm - 7:50 amSTL-LHR
12h 10m1 stop
$799Iberia
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Wed, May 28
2:36 pm - 7:30 amSTL-LHR
10h 54m1 stop
$6,868American Airlines
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Fri, May 16
2:00 pm - 4:00 pmSTL-LHR
20h 00m2 stops
6:40 am - 11:37 pmLHR-STL
22h 57m2 stops
$983Scandinavian Airlines
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Sat, Jan 11 - Mon, Jan 13
11:04 am - 4:00 pmSTL-LHR
22h 56m2 stops
5:00 pm - 11:37 pmLHR-STL
36h 37m2 stops
$1,006Scandinavian Airlines
Find Deal
Fri, Jan 10 - Sun, Jan 12
11:04 am - 4:00 pmSTL-LHR
22h 56m2 stops
5:00 pm - 11:37 pmLHR-STL
36h 37m2 stops
$1,073Scandinavian Airlines
Find Deal
Fri, Jan 10 - Sun, Jan 12
11:04 am - 4:00 pmSTL-LHR
22h 56m2 stops
6:40 am - 11:37 pmLHR-STL
22h 57m2 stops
$1,130Scandinavian Airlines
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Fri, Jan 10 - Sat, Jan 18
12:15 pm - 7:30 pmSTL-LHR
25h 15m3 stops
12:15 pm - 2:43 pmLHR-STL
32h 28m3 stops
$1,359
Find Deal
Sat, Jan 11 - Mon, Jan 13
6:46 pm - 9:35 amSTL-LHR
32h 49m1 stop
8:40 pm - 9:06 amLHR-STL
42h 26m2 stops
$1,460
Find Deal
Sat, Jan 11 - Mon, Jan 13
6:49 pm - 9:35 amSTL-LHR
32h 46m1 stop
7:40 pm - 2:34 pmLHR-STL
48h 54m2 stops
$1,505
Find Deal
Fri, Jan 10 - Sun, Jan 12
3:50 pm - 8:30 amSTL-LHR
10h 40m1 stop
8:30 am - 11:30 pmLHR-STL
21h 00m2 stops
$1,687
Find Deal
Fri, Jan 10 - Sun, Jan 12
3:45 pm - 12:45 pmSTL-LHR
15h 00m1 stop
7:30 pm - 1:55 pmLHR-STL
24h 25m1 stop
$1,719Lufthansa
Find Deal
Fri, Jan 10 - Sat, Jan 18
3:45 pm - 2:45 pmSTL-LHR
17h 00m1 stop
12:05 pm - 7:09 pmLHR-STL
13h 04m1 stop
$1,766Lufthansa
Find Deal
Fri, Jan 10 - Sun, Jan 12

Lufthansa flights from St. Louis to London Heathrow Airport

Our best Lufthansa deals on St. Louis to London Heathrow Airport flight tickets
Lufthansa
Jan 26
STL3:45 pmLambert-St Louis
19h 00m
1 stop
LHR4:45 pmLondon Heathrow
Feb 5
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
Lufthansa
Jan 26
STL12:55 pmLambert-St Louis
15h 50m
2 stops
LHR10:45 amLondon Heathrow
Feb 2
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
Lufthansa
May 19
STL5:31 pmLambert-St Louis
22h 39m
2 stops
LHR10:10 pmLondon Heathrow
Jun 2
LHR5:50 pmLondon Heathrow
27h 31m
2 stops
STL3:21 pmLambert-St Louis

United Airlines flights from St. Louis to London Heathrow Airport

Our best United Airlines deals on St. Louis to London Heathrow Airport flight tickets
United Airlines
Jan 27
STL1:45 pmLambert-St Louis
13h 55m
1 stop
LHR9:40 amLondon Heathrow
Feb 5
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
United Airlines
Apr 16
STL1:12 pmLambert-St Louis
11h 08m
1 stop
LHR6:20 amLondon Heathrow
Apr 25
LHR6:30 amLondon Heathrow
13h 00m
1 stop
STL1:30 pmLambert-St Louis
United Airlines
Apr 19
STL3:50 pmLambert-St Louis
32h 45m
1 stop
LHR6:35 amLondon Heathrow
Apr 30
LHR6:30 amLondon Heathrow
13h 00m
1 stop
STL1:30 pmLambert-St Louis

See travel insights to London from

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

What is the cheapest month to fly to London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from St. Louis, with most prices found around $712. If you’re not able to fly to London Heathrow Airport in February, then April is your next best option. Flight prices from St. Louis to London Heathrow Airport during April average around $797.

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

Our data shows that Thursday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $906. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,015.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from St. Louis to London Heathrow Airport in the evening for as low as $895. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $996.

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

We recommend purchasing flights from St. Louis to London Heathrow Airport 21 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to London Heathrow Airport for $940. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $720.

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

$301

Fastest flight time

10h 07m

Direct flights

None
The best one-way flight to London Heathrow Airport from St. Louis in the past 72 hours is $301. The best round-trip flight deal from St. Louis to London Heathrow Airport found on momondo in the last 72 hours is $681.
The fastest flight from St. Louis to London Heathrow Airport takes 10h 07m
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 07m.

  • 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
1,337 reviews
Search KLM flights
IberiaPriceFrom $631Free CancellationRating
7.0
2,631 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $654Free CancellationRating
7.5
662 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $657Free CancellationRating
6.6
6,785 reviews
Search British Airways flights
United AirlinesPriceFrom $673Free CancellationRating
7.4
8,939 reviews
Search United Airlines flights
American AirlinesPriceFrom $678Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $692Free CancellationRating
8.0
8,499 reviews
Search Delta flights
Air CanadaPriceFrom $728Free CancellationRating
7.0
8,511 reviews
Search Air Canada flights
Air FrancePriceFrom $769Free CancellationRating
7.4
1,486 reviews
Search Air France flights
LufthansaPriceFrom $802Free CancellationRating
6.7
7,077 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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