675 € Cheap Flights from London Heathrow to St Louis

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Flight deals from London Heathrow to St Louis

Looking for a cheap last-minute deal or the best return flight from London Heathrow Airport to St Louis Airport? If you want to travel next month, return fares start from 814 €. Find the lowest prices on one-way and return tickets right here.

St Louis.675 € per passenger.Departing Mon, 26 Oct, returning Fri, 30 Oct.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Mon, 26 Oct, arriving in St Louis.Inbound indirect flight with Scandinavian Airlines, departs from St Louis on Fri, 30 Oct, arriving in London Heathrow.Price includes taxes and charges.From 675 €, select.

St Louis.686 € per passenger.Departing Fri, 28 Aug, returning Sun, 13 Sep.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from London Heathrow on Fri, 28 Aug, arriving in St Louis.Inbound indirect flight with Scandinavian Airlines, departs from St Louis on Sun, 13 Sep, arriving in London Heathrow.Price includes taxes and charges.From 686 €, select.

St Louis.695 € per passenger.Departing Tue, 25 Aug, returning Wed, 21 Oct.Return flight with Aer Lingus and Frontier Airlines.Outbound indirect flight with Aer Lingus, departs from London Heathrow on Tue, 25 Aug, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 21 Oct, arriving in London Heathrow.Price includes taxes and charges.From 695 €, select.

St Louis.706 € per passenger.Departing Tue, 27 Oct, returning Wed, 4 Nov.Return flight with Austrian Airlines.Outbound indirect flight with Austrian Airlines, departs from London Heathrow on Tue, 27 Oct, arriving in St Louis.Inbound indirect flight with Austrian Airlines, departs from St Louis on Wed, 4 Nov, arriving in London Heathrow.Price includes taxes and charges.From 706 €, select.

St Louis.710 € per passenger.Departing Tue, 1 Sep, returning Wed, 2 Dec.Return flight with Aer Lingus and Air Canada.Outbound indirect flight with Aer Lingus, departs from London Heathrow on Tue, 1 Sep, arriving in St Louis.Inbound indirect flight with Air Canada, departs from St Louis on Wed, 2 Dec, arriving in London Heathrow.Price includes taxes and charges.From 710 €, select.

St Louis.711 € per passenger.Departing Wed, 9 Sep, returning Tue, 22 Sep.Return flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 9 Sep, arriving in St Louis.Inbound indirect flight with Austrian Airlines, departs from St Louis on Tue, 22 Sep, arriving in London Heathrow.Price includes taxes and charges.From 711 €, select.

St Louis.725 € per passenger.Departing Sat, 26 Sep, returning Thu, 1 Oct.Return flight with Icelandair and Frontier Airlines.Outbound indirect flight with Icelandair, departs from London Heathrow on Sat, 26 Sep, arriving in St Louis.Inbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 1 Oct, arriving in London Heathrow.Price includes taxes and charges.From 725 €, select.

St Louis.728 € per passenger.Departing Wed, 11 Nov, returning Mon, 16 Nov.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 11 Nov, arriving in St Louis.Inbound indirect flight with Lufthansa, departs from St Louis on Mon, 16 Nov, arriving in London Heathrow.Price includes taxes and charges.From 728 €, select.

St Louis.729 € per passenger.Departing Wed, 25 Nov, returning Tue, 8 Dec.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 25 Nov, arriving in St Louis.Inbound indirect flight with Lufthansa, departs from St Louis on Tue, 8 Dec, arriving in London Heathrow.Price includes taxes and charges.From 729 €, select.

St Louis.729 € per passenger.Departing Wed, 2 Dec, returning Wed, 9 Dec.Return flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 2 Dec, arriving in St Louis.Inbound indirect flight with Austrian Airlines, departs from St Louis on Wed, 9 Dec, arriving in London Heathrow.Price includes taxes and charges.From 729 €, select.

St Louis.738 € per passenger.Departing Wed, 10 Feb, returning Wed, 17 Feb.Return flight with Lufthansa and Austrian Airlines.Outbound indirect flight with Lufthansa, departs from London Heathrow on Wed, 10 Feb, arriving in St Louis.Inbound indirect flight with Austrian Airlines, departs from St Louis on Wed, 17 Feb, arriving in London Heathrow.Price includes taxes and charges.From 738 €, select.

St Louis.741 € per passenger.Departing Mon, 19 Apr, returning Mon, 26 Apr.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from London Heathrow on Mon, 19 Apr, arriving in St Louis.Inbound indirect flight with Lufthansa, departs from St Louis on Mon, 26 Apr, arriving in London Heathrow.Price includes taxes and charges.From 741 €, select.

St Louis.742 € per passenger.Departing Tue, 20 Apr, returning Tue, 4 May.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from London Heathrow on Tue, 20 Apr, arriving in St Louis.Inbound indirect flight with Lufthansa, departs from St Louis on Tue, 4 May, arriving in London Heathrow.Price includes taxes and charges.From 742 €, select.

St Louis.746 € per passenger.Departing Tue, 2 Mar, returning Wed, 17 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 2 Mar, arriving in St Louis.Inbound indirect flight with Air Canada, departs from St Louis on Wed, 17 Mar, arriving in London Heathrow.Price includes taxes and charges.From 746 €, select.

St Louis.746 € per passenger.Departing Tue, 5 Jan, returning Mon, 18 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 5 Jan, arriving in St Louis.Inbound indirect flight with Air Canada, departs from St Louis on Mon, 18 Jan, arriving in London Heathrow.Price includes taxes and charges.From 746 €, select.

St Louis.746 € per passenger.Departing Mon, 10 May, returning Mon, 17 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Mon, 10 May, arriving in St Louis.Inbound indirect flight with Air Canada, departs from St Louis on Mon, 17 May, arriving in London Heathrow.Price includes taxes and charges.From 746 €, 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 October.

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Direct flights from London Heathrow to St Louis

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.

St Louis

20km from central St Louis

ClosestCheapest

from 675 €

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Belleville

32km from central St Louis

from 951 €

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London to St Louis: Flight information

The things to know before you go.

Cheapest flight found	675 €
Cheapest month to fly	October
Average flight time	9 hrs, 5 mins
Most popular airline	Aer Lingus
Average flights per week	18

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

How much are return flights from London Heathrow to St Louis?

The best price we found for a return flight from London Heathrow to St Louis is 675 €. 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.

How long does it take to fly from London Heathrow to St Louis?

9 hours and 5 minutes is the average flight time from London Heathrow to St Louis.

Which airlines fly direct from London Heathrow to St Louis?

Aer Lingus, Finnair and American Airlines fly direct from London Heathrow to St Louis.

How many flights are there a week from London Heathrow to St Louis?

As of July 2026, there are 18 flights per week flying from London Heathrow to St Louis.

When is the cheapest time to fly from London Heathrow to St Louis?

The cheapest month to fly from London Heathrow to St Louis is usually October.

Which upcoming date is cheapest to fly from London Heathrow Airport to St Louis Airport on?

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 Monday, 26 October 2026.

Can I get a direct flight from London Heathrow Airport to St Louis Airport?

Yes – the average flight time is 9 hours and 5 minutes.

How can I find the best flight deal to St Louis?

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.

When is the best time to book flights to St Louis?

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.

Which is the cheapest airline to fly from London Heathrow Airport to St Louis with?

Currently, Scandinavian Airlines and British Airways offer the cheapest flight tickets to St Louis.

Flying from London Heathrow Airport (LHR) to St Louis Airport (STL): what you need to know

The average duration of a direct flight from London Heathrow Airport to St Louis Airport is 9 hours 5 minutes.
St Louis is six hours behind London and is in the UTC-6 timezone.
To ensure you get on your LHR to STL flight, leave enough time to check in and drop off your luggage. Arriving two hours ahead of international departures and an hour before domestic flights is the general rule.
During popular months such as July, you'll want to get to the airport well in advance. Arrive two hours before a domestic departure and four hours ahead of an international flight when you travel during peak periods in general.
Getting to St Louis (and then seeing more of the United States!) is a breeze with British Airways. This popular carrier offers direct flights from London Heathrow Airport to St Louis Airport.
Most travellers choose to travel with British Airways on this route.
Consider adding a stopover when booking your ticket from London Heathrow Airport to St Louis Airport. Just deselect 'Direct flights only' to break up your journey, or perhaps see a new city along the way. Here's where you can stop between LHR and STL:
- Chicago O'Hare International Airport
- Detroit Wayne County Airport
- Montreal Pierre Elliott Trudeau Airport

How to find the cheapest flights from London Heathrow Airport (LHR) to St Louis Airport (STL)

Right now, 398 € is the lowest price we've seen for a one-way London Heathrow Airport to St Louis Airport flight. The best price for a return ticket is 675 €. Remember that fares could change due to availability when booking.
It's a good idea to book ahead of time if you're hoping to get cheap tickets from LHR to STL. That's because airlines adjust prices based on demand, which tends to rise closer to departure.
If you're flexible with your travel dates, try using the 'Whole month' search tool. It'll show you the lowest price across every month when looking for a flight from London Heathrow Airport to St Louis Airport.
Never miss a deal on cheap flights from LHR to STL by creating a Price Alert. You'll receive an email or notification through the app when a lower fare becomes available.
Find the perfect flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from London Heathrow Airport to St Louis Airport, use the 'Sort by' tool. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about London Heathrow Airport (LHR)

Of all flights leaving London Heathrow Airport, 78% touch down on time at their destination.
Central London to London Heathrow Airport is around 24 kilometres. Depending on traffic, it'll take about 45 minutes to get there if you're driving, catching a taxi or ride-sharing.
The trip on public transport takes roughly 25 minutes.
Get your travels off to a leisurely start by staying near LHR. Whether you have an early flight from London Heathrow Airport to St Louis Airport or just don't like being rushed, these hotels are the answer:

Arriving at St Louis Airport (STL)

Consider staying in a hotel close to STL if you're on a late London Heathrow Airport to St Louis Airport flight. Check in to one of these accommodation options and skip the long transfer:
Fast-track your adventure by picking up a St Louis Airport rental car. Grab your wheels from Hertz, Budget or Alamo and experience the lesser-explored corners of St Louis and beyond.
Booking your ride from St Louis Airport around one week ahead gives you the best chance of locking in a great deal.

Getting from St Louis Airport (STL) to central St Louis

You'll find STL at 10701 Lambert International Blvd..
St Louis Airport to central St Louis has a drive time of about 25 minutes. It's approximately 24 kilometres away.
Travelling on public transport will take you roughly 30 minutes.

When to fly to St Louis Airport (STL)

It's time to choose your travel dates for your flight from London Heathrow Airport to St Louis Airport. July is the busiest month to head to St Louis. If you'd like a more low-key vibe, go in March.
The warmest month in St Louis is July, with temperatures ranging between 17ºC (63ºF) and 33ºC (91ºF). Book your flights from London Heathrow Airport to St Louis Airport in this month if this is the type of weather you enjoy.
Look for cheap tickets from LHR to STL in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between -7ºC (19ºF) and 8ºC (46ºF) on average.

Explore more of the United States

Chicago is just one of the many places in the United States waiting to be explored after you've experienced St Louis. Around 418 kilometres away to the north-east, popular attractions include Millennium Park, Art Institute of Chicago and Willis Tower.
Around 370 kilometres east of St Louis, Indianapolis is another favourite stop in the United States. Experience the best of this destination with a visit to Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.