Cheap flights from Heathrow to St Louis

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How to find the cheapest flight from
Heathrow (LHR) to St Louis (STL)

All the information you need to plan the best LHR to STL flight in 2021: compare Heathrow to St Louis flight prices with the expected peak season, weather and rainfall in St Louis.
LHR - STL
Price
£412 - £703
STL
Temperature
7 - 32 °C
STL
Rainfall
57 - 130 mm

Popular in

August

High demand for flights, 22% potential price rise

Cheapest in

February

Best time to find cheap flights, 25% potential price drop

Average price

£494

Average for round-trip flights in April 2021

Round-trip from

£412

From Heathrow to St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Heathrow to St Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 14% on flights from Heathrow to St Louis compared to booking the week you need them. Waiting 57 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £609. For sooner than that we have options available in the next 3 days from £652.

Cheap flights from Heathrow to St Louis in April, May 2021

The best prices found for LHR to STL flights in April, May
30 May - 9 Jun
£371pp
LHR
London Heathrow
Lufthansa
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Lufthansa
 
1 STOP
LHR
London Heathrow
30 May - 9 Jun
£372pp
LHR
London Heathrow
Lufthansa
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Lufthansa
   
2 STOPS
LHR
London Heathrow
17 May - 27 May
£391pp
LHR
London Heathrow
United Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
 
1 STOP
LHR
London Heathrow

Heathrow to St Louis 2021 flight deals

Cheap flights to St Louis from Heathrow found for this year
9 Sep - 28 Oct
£336pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Lufthansa
 
1 STOP
LHR
London Heathrow
13 Sep - 20 Oct
£337pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Lufthansa
 
1 STOP
LHR
London Heathrow
9 Sep - 28 Oct
£338pp
LHR
London Heathrow
Air Canada
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Air Canada
   
2 STOPS
LHR
London Heathrow

Last-minute flights from Heathrow to St Louis

Late deals on return flights to St Louis from Heathrow, departing today and this week
30 Apr - 7 May
£493pp
LHR
London Heathrow
Austrian Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Austrian Airlines
 
1 STOP
LHR
London Heathrow
29 Apr - 7 Jul
£494pp
LHR
London Heathrow
Lufthansa
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Lufthansa
 
1 STOP
LHR
London Heathrow
29 Apr - 21 Jul
£495pp
LHR
London Heathrow
Air Canada
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Air Canada
   
2 STOPS
LHR
London Heathrow

One-way flights to St Louis from St Louis

The cheapest one-way flights from Heathrow to St Louis
06:00 - 18:16
United Airlines
2 stops
18h 16m
LHR - STL
United Airlines
£356
United
10:05 - 07:57
Air Canada
2 stops
27h 52m
LHR - STL
Air Canada
£496
ChecknFly
04:40 - 12:42
Finnair
1 stop
14h 02m
LHR - STL
Finnair
£675
World Air Fares

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Heathrow</span> to <span class="emphasized">St Louis</span> flights.

Flight FAQs

From Heathrow to St Louis

Are flight prices decreasing from Heathrow to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Heathrow and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from London Heathrow to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of the carriers operating flights from London Heathrow to Lambert-St Louis that may be offering flexible cancellation policies are Finnair, American Airlines, and United Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Heathrow to St Louis for under £359 on Cheapflights?

Yes, there are multiple flights from Heathrow to St Louis for under £359. The cheapest flight booked recently is on Multiple Airlines for just £336, but on average you can expect to pay £359.

Are there direct flights from Heathrow to St Louis for under £359 on Cheapflights?

There are no direct flights from Heathrow to St Louis, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Heathrow to St Louis for under £503?

There are currently 8+ open flights from Heathrow to St Louis within the next 7 days for less than £503.

Does it rain more in Heathrow or St Louis?

The rainfall in Heathrow is generally more than the rainfall in St Louis. This will continue over the next 20 days.

Is Heathrow weather warmer or cooler than St Louis?

Expect the weather to be around 32 °C on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in St Louis is generally hotter than in Heathrow.

How long does is the flight from Heathrow to St Louis?

For as low as £424, SWISS can have you in St Louis from Heathrow in 11h 30m. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines to flying from Heathrow to St Louis return?

Our cheapest airline available from Heathrow to St Louis is Air Canada. Our recent data shows that you can find tickets from as low as £339 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £368 and £391 round-trip. Users have found that Air Canada is 38% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Heathrow to St Louis one-way?

To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at £310. United Airlines flights start at £323 while deals on Air Canada start at £343 one-way.

Alternative routes for Heathrow to St Louis

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for St Louis

Things to know before you go - useful duration and weather info for your trip from Heathrow to St Louis.
Today's exchange rate
£1 = $1.40
Average temperature for April in St Louis
21.0 °C
Avg rainfall for April in St Louis
104.0 mm

Airports servicing London

Airports servicing St. Louis

Top 7 airlines flying from Heathrow to St Louis

The chart below displays the airlines Cheapflights users travelling from Heathrow to St Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Iberia
£451 £687 No cancel fee 77%
Search Iberia flights
Finnair
£526 £743 No cancel fee 76%
Search Finnair flights
American Airlines
£492 £746 No cancel fee 71%
Search American Airlines flights
United Airlines
£563 £854 No cancel fee 69%
Search United Airlines flights
British Airways
£475 £1,024 No cancel fee 70%
Search British Airways flights
Virgin Atlantic
£849 £1,106 No cancel fee 72%
Search Virgin Atlantic flights
Air Canada
£691 £1,191 No cancel fee 67%
Search Air Canada flights
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