LHR - STL Price
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£412 - £703
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STL Temperature
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7 - 32 °C
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STL Rainfall
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57 - 130 mm
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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 |
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.
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.
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.
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.
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.
There are currently 8+ open flights from Heathrow to St Louis within the next 7 days for less than £503.
The rainfall in Heathrow is generally more than the rainfall in St Louis. This will continue over the next 20 days.
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.
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.
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.
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.
Airline | Cheapest | Average | Flexibility | On-time | COVID-19 safety | |
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£451 | £687 | No cancel fee | 77% |
Search Iberia flights
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£526 | £743 | No cancel fee | 76% |
Search Finnair flights
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£492 | £746 | No cancel fee | 71% |
Search American Airlines flights
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£563 | £854 | No cancel fee | 69% |
Search United Airlines flights
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£475 | £1,024 | No cancel fee | 70% |
Search British Airways flights
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£849 | £1,106 | No cancel fee | 72% |
Search Virgin Atlantic flights
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£691 | £1,191 | No cancel fee | 67% |
Search Air Canada flights
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