If you're looking to fly from London Heathrow to St Louis, you might like to know that 03 / Sep / 2025 currently has the cheapest flights. At the moment, there are 13 airlines flying to St Louis. Go through the results to find the right flights for you – you can adjust the filters to see find even more flights to St Louis.
The most popular airlines offering flights to St Louis are Aer Lingus, British Airways & Virgin Atlantic. Aer Lingus is the most popular one, but that doesn’t mean their flights will be the cheapest. If you can't find a flight time that suits you, why not look at flying out from a different airport?
Your flight from London Heathrow to St Louis will take at least 11 hrs 35 mins. On average, it takes 12 hrs 50 mins to fly the 6747 km distance. Take a look at flight times to see which one works best for you.
January is normally the cheapest month to fly to St Louis, but it’s important to try different options when you search. Searching by month, for instance, will show you the best time of the week to fly. July is always the most expensive time to fly but, if you check regularly and book early, you have a better chance of getting a good deal.
