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Cheap flights from London Heathrow Airport to St. Louis from $414

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to St. Louis departing on 4/7. 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 London Heathrow Airport to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from London Heathrow Airport to St. Louis 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 London Heathrow Airport to St. Louis.

Cheap last minute flights

Planning a quick getaway from London Heathrow Airport to St. Louis? 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 St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from London Heathrow Airport to St. Louis

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

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
12:15 pm - 11:30 amLHR-STL
29h 15m3 stops
12:15 pm - 10:50 amSTL-LHR
16h 35m3 stops
Fri, Feb 21 - Mon, Feb 24
10:20 am - 11:30 amLHR-STL
31h 10m3 stops
12:15 pm - 6:30 pmSTL-LHR
24h 15m3 stops
Mon, Feb 3 - Mon, Feb 17
12:35 pm - 10:28 pmLHR-STL
15h 53m1 stop
11:04 am - 8:15 amSTL-LHR
15h 11m1 stop
$722Finnair
Find Deal
Wed, Jan 29 - Fri, Feb 28
6:10 pm - 10:17 pmLHR-STL
34h 07m2 stops
11:25 am - 7:20 amSTL-LHR
13h 55m1 stop
$728Finnair
Find Deal
Mon, Feb 3 - Mon, Feb 17
10:15 am - 8:41 pmLHR-STL
16h 26m1 stop
11:04 am - 6:50 amSTL-LHR
13h 46m1 stop
$757British Airways
Find Deal
Mon, Feb 3 - Mon, Feb 17
7:25 pm - 11:32 pmLHR-STL
34h 07m2 stops
1:05 pm - 10:50 amSTL-LHR
40h 45m2 stops
$916Austrian Airlines
Find Deal
Mon, Mar 3 - Mon, Mar 10
6:30 am - 1:55 pmLHR-STL
13h 25m1 stop
8:05 am - 7:10 amSTL-LHR
17h 05m2 stops
$917United Airlines
Find Deal
Wed, Jan 22 - Thu, Feb 20
9:05 am - 5:36 pmLHR-STL
38h 31m2 stops
11:28 am - 8:35 pmSTL-LHR
27h 07m1 stop
$921Austrian Airlines
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Sun, Jan 19 - Sun, Jan 26
1:30 pm - 2:14 pmLHR-STL
30h 44m2 stops
5:30 pm - 7:55 amSTL-LHR
32h 25m1 stop
$940United Airlines
Find Deal
Sun, Jan 19 - Sun, Jan 26
11:55 am - 10:19 pmLHR-STL
16h 24m1 stop
6:00 pm - 8:15 amSTL-LHR
32h 15m1 stop
$1,254British Airways
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Fri, Jan 3 - Wed, Jan 8
6:20 am - 11:46 pmLHR-STL
47h 26m3 stops
Mon, Apr 7
2:50 pm - 4:53 pmLHR-STL
32h 03m2 stops
$502WestJet
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Tue, Feb 25
2:50 pm - 9:06 amLHR-STL
48h 16m3 stops
Sat, Jan 11
1:45 pm - 2:42 pmLHR-STL
30h 57m2 stops
$782TAP AIR PORTUGAL
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Mon, Apr 7
11:55 am - 9:40 pmLHR-STL
14h 45m1 stop
$864Iberia
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Tue, Mar 25
9:15 am - 2:51 pmLHR-STL
11h 36m1 stop
$867British Airways
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Sun, Apr 13
12:30 pm - 9:23 pmLHR-STL
14h 53m1 stop
$1,166Iberia
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Sun, Apr 13
2:25 pm - 10:10 pmLHR-STL
13h 45m1 stop
$1,481British Airways
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Fri, Apr 11
9:30 am - 3:47 pmLHR-STL
36h 17m3 stops
$1,863United Airlines
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Sun, Apr 13
9:30 am - 3:47 pmLHR-STL
36h 17m3 stops
$2,249United Airlines
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Sat, Apr 12
11:30 am - 9:43 pmLHR-STL
16h 13m2 stops
10:13 am - 6:50 amSTL-LHR
14h 37m1 stop
$1,261Virgin Atlantic
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Tue, Dec 24 - Tue, Dec 31
10:50 am - 6:47 pmLHR-STL
13h 57m1 stop
11:46 am - 7:05 amSTL-LHR
13h 19m1 stop
$1,266Virgin Atlantic
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Tue, Dec 24 - Tue, Dec 31
11:45 am - 11:51 pmLHR-STL
18h 06m1 stop
9:30 am - 7:00 amSTL-LHR
15h 30m1 stop
$1,276Finnair
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Thu, Dec 26 - Tue, Dec 31
6:30 am - 12:10 pmLHR-STL
35h 40m3 stops
12:15 pm - 5:20 pmSTL-LHR
23h 05m3 stops
$1,294
Find Deal
Tue, Dec 24 - Tue, Dec 31
6:40 am - 11:45 amLHR-STL
35h 05m3 stops
1:00 pm - 4:00 pmSTL-LHR
21h 00m3 stops
$1,358
Find Deal
Mon, Dec 23 - Mon, Dec 30
12:35 pm - 10:48 pmLHR-STL
16h 13m1 stop
1:45 pm - 12:05 pmSTL-LHR
16h 20m1 stop
$1,362Finnair
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Thu, Dec 26 - Tue, Dec 31
4:20 pm - 10:47 amLHR-STL
24h 27m2 stops
6:25 am - 5:55 amSTL-LHR
17h 30m2 stops
$1,546Lufthansa
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Thu, Dec 26 - Tue, Dec 31
8:55 am - 7:57 pmLHR-STL
17h 02m2 stops
8:00 am - 5:55 amSTL-LHR
15h 55m2 stops
$1,590United Airlines
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Tue, Dec 24 - Tue, Dec 31
7:40 am - 9:45 pmLHR-STL
20h 05m2 stops
8:00 am - 5:55 amSTL-LHR
15h 55m2 stops
$1,630United Airlines
Find Deal
Thu, Dec 26 - Tue, Dec 31
10:25 am - 5:51 pmLHR-STL
13h 26m1 stop
1:05 pm - 10:50 amSTL-LHR
15h 45m1 stop
$1,644Lufthansa
Find Deal
Thu, Dec 26 - Tue, Dec 31

Austrian Airlines flights from London Heathrow Airport to St. Louis

Our best Austrian Airlines deals on London Heathrow Airport to St. Louis flight tickets
Austrian Airlines
Mar 3
LHR7:25 pmLondon Heathrow
34h 07m
2 stops
STL11:32 pmLambert-St Louis
Mar 10
STL1:05 pmLambert-St Louis
40h 45m
2 stops
LHR10:50 amLondon Heathrow
Austrian Airlines
Jan 19
LHR9:05 amLondon Heathrow
38h 31m
2 stops
STL5:36 pmLambert-St Louis
Jan 26
STL11:28 amLambert-St Louis
27h 07m
1 stop
LHR8:35 pmLondon Heathrow
Austrian Airlines
Jan 23
LHR12:05 pmLondon Heathrow
41h 25m
2 stops
STL11:30 pmLambert-St Louis
Jan 26
STL11:28 amLambert-St Louis
27h 07m
1 stop
LHR8:35 pmLondon Heathrow

Lufthansa flights from London Heathrow Airport to St. Louis

Our best Lufthansa deals on London Heathrow Airport to St. Louis flight tickets
Lufthansa
Feb 21
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
Feb 24
STL1:03 pmLambert-St Louis
13h 22m
2 stops
LHR8:25 amLondon Heathrow
Lufthansa
Jan 19
LHR7:30 pmLondon Heathrow
28h 06m
2 stops
STL5:36 pmLambert-St Louis
Jan 26
STL5:30 pmLambert-St Louis
32h 25m
1 stop
LHR7:55 amLondon Heathrow
Lufthansa
Jan 29
LHR6:00 pmLondon Heathrow
27h 38m
2 stops
STL3:38 pmLambert-St Louis
Feb 28
STL10:18 amLambert-St Louis
13h 37m
2 stops
LHR5:55 amLondon Heathrow

See travel insights to St. Louis from

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

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 to St. Louis?

In general, January is the cheapest month to fly from London Heathrow Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $729. The month of February is another great option to travel to St. Louis, with average flight prices from London Heathrow Airport averaging around $755.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $952. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from London Heathrow Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,229 per ticket.

How far in advance should I book a flight to St. Louis?

The best time to book a flight to St. Louis from London Heathrow Airport is 56 days out, which is when prices tend to be around $891. In the past 72 hours, momondo users found flights from London Heathrow Airport to St. Louis for as low as $654.

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

You could potentially save up to 41% on your flight if you consider stops on a London Heathrow Airport to St. Louis flight.

How have London Heathrow Airport to St. Louis flight prices changed over time?

As of December 2024, prices for London Heathrow Airport to St. Louis flights are approximately 26% more expensive when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Heathrow Airport to St. Louis (LHR to STL) flight deals and tips

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

Best Price Found

$414

Fastest flight time

11h 36m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from London Heathrow Airport in the past 72 hours is $414. The best round-trip flight deal from London Heathrow Airport to St. Louis found on momondo in the last 72 hours is $650.
The fastest flight from London Heathrow Airport to St. Louis takes 11h 36m
There are no direct flights from London Heathrow Airport to St. Louis. Popular non-direct route for this connection is London Heathrow Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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

    The straight-line distance from London Heathrow to Lambert-St Louis is 4185.8 mi. By plane, this route typically takes 13h 00m.

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

    Prices for flights from London Heathrow Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

    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 London Heathrow Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis 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 London Heathrow Airport to St. Louis?


Best airlines flying from London Heathrow Airport to St. Louis

Compare and see reviews for airlines that fly from London Heathrow Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $278Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $867Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
British AirwaysPriceFrom $961Free CancellationRating
6.6
6,810 reviews
Search British Airways flights

Why use momondo?

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

It is quick and easy to find London to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

momondo does allow users to show only those flights to St. Louis from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from London.

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

Yes momondo offers price alerts on flights to St. Louis from London. 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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