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Cheap Flights from London Heathrow to St Louis

Compare London Heathrow to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

Book the best St Louis fare with no extra fees

Flight deals from London Heathrow to St Louis

Looking for a cheap last-minute deal or the best return flight from London Heathrow to St Louis? Find the lowest prices on one-way and return tickets right here.
St Louis.SAR 2,048 per passenger.Departing Thu, 8 May.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from London Heathrow on Thu, 8 May, arriving in St Louis.Price includes taxes and charges.From SAR 2,048, select.
St Louis.SAR 2,222 per passenger.Departing Mon, 21 Jul.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Mon, 21 Jul, arriving in St Louis.Price includes taxes and charges.From SAR 2,222, select.
St Louis.SAR 2,329 per passenger.Departing Sun, 20 Apr.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from London Heathrow on Sun, 20 Apr, arriving in St Louis.Price includes taxes and charges.From SAR 2,329, select.
St Louis.SAR 2,447 per passenger.Departing Sat, 2 Aug.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Sat, 2 Aug, arriving in St Louis.Price includes taxes and charges.From SAR 2,447, select.
St Louis.SAR 2,472 per passenger.Departing Mon, 2 Jun.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Mon, 2 Jun, arriving in St Louis.Price includes taxes and charges.From SAR 2,472, select.
St Louis.SAR 2,787 per passenger.Departing Sun, 28 Sep.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Sun, 28 Sep, arriving in St Louis.Price includes taxes and charges.From SAR 2,787, select.
St Louis.SAR 3,093 per passenger.Departing Sat, 6 Dec.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Sat, 6 Dec, arriving in St Louis.Price includes taxes and charges.From SAR 3,093, select.
St Louis.SAR 3,807 per passenger.Departing Mon, 2 Feb.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Mon, 2 Feb, arriving in St Louis.Price includes taxes and charges.From SAR 3,807, select.

Find the cheapest month to fly from London Heathrow to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to St Louis flights are currently cheapest in May.
Apr
from SAR 2,328
May
from SAR 2,047
Jun
from SAR 2,471
Jul
from SAR 2,221
Aug
from SAR 2,446
Sep
from SAR 2,786
Oct
Find prices
Nov
Find prices
Dec
from SAR 3,092
Jan
Find prices
Feb
from SAR 3,806
Mar
Find prices

London Heathrow to St Louis: Alternative routes

Compare routes from London Heathrow to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

London to St Louis: Flight information

The things to know before you go.
Cheapest flight foundSAR 2,047
Cheapest month to flyMay

Finding cheap flights from London Heathrow to St Louis: Frequently asked questions

The best price we found for a return flight from London Heathrow to St Louis is SAR 3,371. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from London Heathrow to St Louis. But we found flights with one or more stops from SAR 3,372.
As of April 2025, there are no flights flying from London Heathrow to St Louis.
The cheapest month to fly from London Heathrow to St Louis is usually April 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to St Louis Airport on Tuesday, 3 June 2025.
No airlines currently offer direct flights between London Heathrow Airport and St Louis Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Air Canada offers the cheapest flight tickets to St Louis.

How to find cheap flights to St Louis from London Heathrow

Looking for cheap tickets from London Heathrow to St Louis? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from London Heathrow to St Louis. And with us there are no hidden fees - what you see is what you pay.
  • Compare flight deals to St Louis from London Heathrow from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
  • Flex your dates to find the best London Heathrow-St Louis ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to St Louis from London Heathrow.
  • Set up a Price Alert. You can easily track the fare of your cheap London Heathrow-St Louis flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between London Heathrow and St Louis? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results.
  • Find the cheapest Business class flights from London Heathrow and St Louis. We scour the internet for the best Business, Premium Economy and First Class flight fares to St Louis, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for London Heathrow to St Louis flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.

    • Combine your flight to St Louis from London Heathrow with hotels and car hire

    Once you've secured your cheap flight ticket from London Heathrow to St Louis, discover the best prices and exclusive rates for hotels in St Louis or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


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Plan the rest of your trip from London to St Louis

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.