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Cheap flights from St. Louis to London from $278

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 8/18. 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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0 bags

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Find the cheapest flights from St. Louis to London

Cheap round-trip flights

Virgin Atlantic Logo
5:11 pm - 1:30 pmSTL-LHR
14h 19m1 stop
Virgin Atlantic Logo
11:20 am - 7:07 pmLHR-STL
13h 47m1 stop
$497Virgin Atlantic
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Wed, Aug 13 - Wed, Aug 20
British Airways Logo
1:15 pm - 6:40 amSTL-LHR
11h 25m1 stop
British Airways Logo
7:50 am - 8:47 pmLHR-STL
18h 57m2 stops
$505British Airways
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Wed, Aug 13 - Wed, Aug 20
United Airlines Logo
1:30 pm - 6:30 amSTL-LHR
11h 00m1 stop
United Airlines Logo
2:05 pm - 8:00 pmLHR-STL
11h 55m1 stop
$512United Airlines
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Tue, Aug 19 - Wed, Aug 27
Air Canada Logo
1:30 pm - 6:30 amSTL-LHR
11h 00m1 stop
Air Canada Logo
9:30 am - 8:00 pmLHR-STL
16h 30m1 stop
$516Air Canada
Find Deal
Tue, Aug 19 - Wed, Aug 27
United Airlines Logo
1:30 pm - 10:00 amSTL-LHR
14h 30m1 stop
United Airlines Logo
6:50 am - 3:44 pmLHR-STL
14h 54m2 stops
$517United Airlines
Find Deal
Wed, Aug 13 - Tue, Aug 19
Delta Logo
11:02 am - 6:45 amSTL-LHR
13h 43m1 stop
Delta Logo
11:30 am - 10:02 pmLHR-STL
16h 32m2 stops
$523Delta
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Tue, Aug 19 - Tue, Aug 26
Delta Logo
1:26 pm - 1:30 pmSTL-LHR
18h 04m1 stop
Delta Logo
11:30 am - 10:02 pmLHR-STL
16h 32m2 stops
$524Delta
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Tue, Aug 19 - Tue, Aug 26
Iberia Logo
1:55 pm - 6:50 amSTL-LHR
34h 55m1 stop
Iberia Logo
4:30 pm - 10:27 pmLHR-STL
35h 57m1 stop
$531Iberia
Find Deal
Sat, Jan 3 - Wed, Jan 14
Iberia Logo
3:59 pm - 6:25 amSTL-LHR
32h 26m1 stop
Iberia Logo
2:25 pm - 9:53 pmLHR-STL
13h 28m1 stop
$533Iberia
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Sat, Sep 6 - Fri, Sep 19
Air Canada Logo
1:30 pm - 10:00 amSTL-LHR
14h 30m1 stop
Air Canada Logo
9:30 am - 7:38 pmLHR-STL
16h 08m2 stops
$575Air Canada
Find Deal
Sat, Aug 23 - Fri, Sep 5

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
Aug 19
STL1:30 pmLambert-St Louis
11h 00m
1 stop
LHR6:30 amLondon Heathrow
Aug 27
LHR9:30 amLondon Heathrow
16h 30m
1 stop
STL8:00 pmLambert-St Louis
$516
Find similar
Air Canada
Aug 23
STL1:30 pmLambert-St Louis
14h 30m
1 stop
LHR10:00 amLondon Heathrow
Sep 5
LHR9:30 amLondon Heathrow
16h 08m
2 stops
STL7:38 pmLambert-St Louis
$575
Find similar
Air Canada
Jul 28
STL4:00 pmLambert-St Louis
10h 35m
1 stop
LHR8:35 amLondon Heathrow
Aug 14
LHR9:30 amLondon Heathrow
16h 15m
2 stops
STL7:45 pmLambert-St Louis
$756
Find similar

Delta flights from St. Louis to London Heathrow Airport

Our best Delta deals on St. Louis to London Heathrow Airport flight tickets
Delta
Aug 19
STL11:02 amLambert-St Louis
13h 43m
1 stop
LHR6:45 amLondon Heathrow
Aug 26
LHR11:30 amLondon Heathrow
16h 32m
2 stops
STL10:02 pmLambert-St Louis
$523
Find similar
Delta
Aug 19
STL1:26 pmLambert-St Louis
18h 04m
1 stop
LHR1:30 pmLondon Heathrow
Aug 26
LHR11:30 amLondon Heathrow
16h 32m
2 stops
STL10:02 pmLambert-St Louis
$524
Find similar
Delta
Aug 24
STL3:30 pmLambert-St Louis
15h 40m
1 stop
LHR1:10 pmLondon Heathrow
Sep 5
LHR11:30 amLondon Heathrow
17h 53m
2 stops
STL11:23 pmLambert-St Louis
$525
Find similar

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 October is, on average, the cheapest month to fly to London Heathrow Airport from St. Louis, with most prices found around $810. If you’re not able to fly to London Heathrow Airport in October, then March is your next best option. Flight prices from St. Louis to London Heathrow Airport during March average around $829.

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?

You are more likely to see cheaper flights to London Heathrow Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $946 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from St. Louis for as low as $827 on momondo.

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

You could potentially save up to 7% 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

$278

Fastest flight time

9h 56m

Direct flights

None
The best one-way flight to London Heathrow Airport from St. Louis in the past 72 hours is $278. The best round-trip flight deal from St. Louis to London Heathrow Airport found on momondo in the last 72 hours is $497.
The fastest flight from St. Louis to London Heathrow Airport takes 9h 56m
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.
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  • 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 9h 56m.

  • 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
Scandinavian AirlinesPriceFrom $669Free CancellationRating
7.3
1,423 reviews
Search Scandinavian Airlines flights
IberiaPriceFrom $669Free CancellationRating
7.0
2,839 reviews
Search Iberia flights
Air CanadaPriceFrom $678Free CancellationRating
7.1
9,734 reviews
Search Air Canada flights
British AirwaysPriceFrom $691Free CancellationRating
6.6
7,145 reviews
Search British Airways flights
United AirlinesPriceFrom $697Free CancellationRating
7.4
8,863 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $703Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $706Free CancellationRating
8.0
7,957 reviews
Search Delta flights
American AirlinesPriceFrom $717Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $725Free CancellationRating
6.8
7,213 reviews
Search Lufthansa flights
KLMPriceFrom $726Free CancellationRating
7.8
1,373 reviews
Search KLM flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Slough
Dover
Luton
Croydon
Dartford
Guildford
Stansted
Milton Keynes
Hayes
Salisbury
Ilford
Swindon
Colchester
Stratford-upon-Avon
Chelmsford
Canterbury
Watford
Richmond

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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