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Cheap flights from London Heathrow Airport to St. Louis from £622

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 18/5. 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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0 bags

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Find the cheapest flights from London Heathrow Airport to St. Louis

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London Heathrow Airport to St. Louis.
 Logo
11:30 - 14:54LHR-STL
33h 24m3 stops
 Logo
08:44 - 22:55STL-LHR
32h 11m3 stops
Fri, 30 May - Fri, 1 Aug
Iberia Logo
12:30 - 20:58LHR-STL
14h 28m1 stop
Iberia Logo
19:30 - 12:15STL-LHR
10h 45m1 stop
£685Iberia
Find Deal
Tue, 6 May - Mon, 19 May
British Airways Logo
08:25 - 20:13LHR-STL
17h 48m2 stops
British Airways Logo
16:17 - 10:50STL-LHR
12h 33m1 stop
£709British Airways
Find Deal
Mon, 1 Sep - Fri, 12 Sep
British Airways Logo
06:15 - 20:58LHR-STL
20h 43m2 stops
British Airways Logo
13:38 - 10:30STL-LHR
14h 52m1 stop
£715British Airways
Find Deal
Thu, 15 May - Sun, 18 May
Lufthansa Logo
14:05 - 19:58LHR-STL
11h 53m1 stop
Lufthansa Logo
09:40 - 09:20STL-LHR
17h 40m2 stops
£719Lufthansa
Find Deal
Tue, 6 May - Mon, 19 May
Lufthansa Logo
12:05 - 12:19LHR-STL
30h 14m2 stops
Lufthansa Logo
09:40 - 09:20STL-LHR
17h 40m2 stops
£728Lufthansa
Find Deal
Tue, 6 May - Mon, 19 May
United Airlines Logo
07:25 - 21:48LHR-STL
20h 23m2 stops
United Airlines Logo
09:40 - 06:45STL-LHR
15h 05m2 stops
£740United Airlines
Find Deal
Mon, 5 May - Mon, 19 May
United Airlines Logo
07:25 - 23:58LHR-STL
22h 33m2 stops
United Airlines Logo
09:40 - 07:15STL-LHR
15h 35m2 stops
£741United Airlines
Find Deal
Mon, 5 May - Mon, 19 May
Virgin Atlantic Logo
12:25 - 23:26LHR-STL
17h 01m1 stop
Virgin Atlantic Logo
15:40 - 11:25STL-LHR
13h 45m2 stops
£1,541Virgin Atlantic
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Sat, 31 May - Fri, 6 Jun
Virgin Atlantic Logo
09:20 - 20:47LHR-STL
17h 27m1 stop
Virgin Atlantic Logo
11:51 - 07:15STL-LHR
13h 24m2 stops
£1,790Virgin Atlantic
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Sat, 16 Aug - Thu, 21 Aug

Aer Lingus flights from London Heathrow Airport to St. Louis

Our best Aer Lingus deals on London Heathrow Airport to St. Louis flight tickets
Aer Lingus
13 Oct
LHR08:50London Heathrow
15h 13m
2 stops
STL18:03Lambert-St Louis
19 Oct
STL06:35Lambert-St Louis
21h 45m
2 stops
LHR10:20London Heathrow
Aer Lingus
15 Oct
LHR13:25London Heathrow
16h 00m
2 stops
STL23:25Lambert-St Louis
19 Oct
STL14:40Lambert-St Louis
14h 30m
2 stops
LHR11:10London Heathrow
Aer Lingus
26 Apr
LHR16:50London Heathrow
36h 43m
2 stops
STL23:33Lambert-St Louis
30 May
STL06:00Lambert-St Louis
20h 00m
2 stops
LHR08:00London Heathrow

Air France flights from London Heathrow Airport to St. Louis

Our best Air France deals on London Heathrow Airport to St. Louis flight tickets
Air France
29 Apr
LHR11:30London Heathrow
18h 06m
2 stops
STL23:36Lambert-St Louis
2 May
STL12:51Lambert-St Louis
11h 54m
1 stop
LHR06:45London Heathrow
Air France
26 Apr
LHR06:15London Heathrow
16h 31m
2 stops
STL16:46Lambert-St Louis
29 May
STL17:40Lambert-St Louis
13h 50m
1 stop
LHR13:30London Heathrow
Air France
26 Apr
LHR11:30London Heathrow
18h 06m
2 stops
STL23:36Lambert-St Louis
29 May
STL13:09Lambert-St Louis
15h 21m
2 stops
LHR10:30London 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?

The month of February is, on average, the cheapest month to fly to St. Louis from London Heathrow Airport, with most prices found around £610. If you’re not able to fly to St. Louis in February, then September is your next best option. Flight prices from London Heathrow Airport to St. Louis during September average around £616.

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

Our data shows that Wednesday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as £607. Flights from London Heathrow Airport to St. Louis on a Sunday will generally be more expensive and average around £722. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest London Heathrow Airport to St. Louis flights are usually those with departure times in the evening. Our users have found flights to St. Louis in the evening for as low as £565. In contrast, the most expensive time of day to depart to St. Louis is in the morning when prices are around £665.

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

You are more likely to see cheaper flights to St. Louis from London Heathrow Airport when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around £699 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from London Heathrow Airport for as low as £621 on momondo.

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

As of April 2025, prices for London Heathrow Airport to St. Louis flights are approximately 1% 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 return 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

£622

Fastest flight time

11h 52m

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 £622. The best return flight deal from London Heathrow Airport to St. Louis found on momondo in the last 72 hours is £682.
The fastest flight from London Heathrow Airport to St. Louis takes 11h 52m
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 distance between London Heathrow and Lambert-St Louis is about 4185.8 mi. A reasonable flight in good conditions will take 11h 52m.

  • 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 travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
FinnairPriceFrom £512Free CancellationRating
7.6
1,272 reviews
Search Finnair flights
IberiaPriceFrom £606Free CancellationRating
7.0
2,686 reviews
Search Iberia flights
British AirwaysPriceFrom £629Free CancellationRating
6.6
6,815 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £640Free CancellationRating
7.4
642 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom £643Free CancellationRating
7.4
8,685 reviews
Search United Airlines flights
LufthansaPriceFrom £682Free CancellationRating
6.7
7,029 reviews
Search Lufthansa flights
Air CanadaPriceFrom £708Free CancellationRating
7.0
9,195 reviews
Search Air Canada flights

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to St. Louis for 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?

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

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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