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.Rs115,422 per passenger.Departing Mon, 2 Feb.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Mon, 2 Feb, arriving in St Louis.Price includes taxes and charges.From Rs115,422, select.

St Louis.Rs129,470 per passenger.Departing Mon, 2 Mar.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from London Heathrow on Mon, 2 Mar, arriving in St Louis.Price includes taxes and charges.From Rs129,470, select.

St Louis.Rs135,408 per passenger.Departing Wed, 6 May.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Wed, 6 May, arriving in St Louis.Price includes taxes and charges.From Rs135,408, select.

St Louis.Rs135,790 per passenger.Departing Wed, 22 Apr.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Wed, 22 Apr, arriving in St Louis.Price includes taxes and charges.From Rs135,790, select.

St Louis.Rs135,856 per passenger.Departing Sat, 31 Jan.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from London Heathrow on Sat, 31 Jan, arriving in St Louis.Price includes taxes and charges.From Rs135,856, select.

St Louis.Rs136,078 per passenger.Departing Tue, 5 May.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Tue, 5 May, arriving in St Louis.Price includes taxes and charges.From Rs136,078, select.

St Louis.Rs136,223 per passenger.Departing Wed, 23 Sep.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Wed, 23 Sep, arriving in St Louis.Price includes taxes and charges.From Rs136,223, select.

St Louis.Rs136,645 per passenger.Departing Wed, 23 Sep.One-way flight with Finnair.Outbound direct flight with Finnair departs from London Heathrow on Wed, 23 Sep, arriving in St Louis.Price includes taxes and charges.From Rs136,645, 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 February.

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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.

London to St Louis: Flight information

The things to know before you go.

Cheapest flight found	Rs115,422
Cheapest month to fly	February
Average flight time	9 hrs, 5 mins
Most popular airline	Aer Lingus
Average flights per week	20

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 Rs152,947. 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 December 2025, there are 20 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 February.

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 Wednesday, 4 February 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, Austrian Airlines and Finnair offer the cheapest flight tickets to St Louis.

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

The timezone in St Louis is UTC-5, which is five hours behind London.
For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to catch your LHR to STL flight.
Flying during a peak month such as July? Major public holidays and other high seasons can mean longer lines at airport checkpoints. Play it safe and get there up to four hours ahead of international flights and two hours before domestic departures.
Consider adding a stopover when booking your ticket from London Heathrow Airport to Lambert-St. Louis International Airport. Just deselect 'Direct flights only' to break up your trip, or maybe even explore a new city along the way. Check out these options between LHR and STL:
- O'Hare International Airport
- Detroit Metropolitan Wayne County Airport
- Montreal-Pierre Elliott Trudeau International Airport

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

Rs115,422 is currently the lowest price for a one-way London Heathrow Airport to Lambert-St. Louis International Airport flight. Return flights start from Rs152,947. These prices can change depending on demand.
It's usually smart to book as early as possible if you want to find cheap tickets from LHR to STL. That's because airlines adjust prices based on demand, which tends to increase closer to departure.
If you can be flexible with your travel plans, use the 'Whole month' tool. It'll give you the cheapest price across the month when searching for a flight from London Heathrow Airport to Lambert-St. Louis International Airport.
Cut down on the time spent looking for cheap flights from LHR to STL by creating a Price Alert. You'll receive an email or push notification on the app when a new low fare is offered.
Discover the right flight for you with the help of the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from London Heathrow Airport to Lambert-St. Louis International Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and journey duration.

Handy information about London Heathrow Airport (LHR)

68.18% of flights leaving from London Heathrow Airport reach their destination on schedule.
To reach London Heathrow Airport from central London, it takes about 55 minutes by car. Of course, this depends on traffic. It's approximately 31 kilometres from the airport to the city centre.
Catching public transport? Expect a trip time of around 1 hour.
Get your break off to a stress-free start by staying near LHR. Whether you're taking an early flight from London Heathrow Airport to Lambert-St. Louis International Airport or want to avoid feeling rushed, these hotels are the answer:

Arriving at Lambert-St. Louis International Airport (STL)

The last thing you want is a lengthy journey to your hotel if you're getting in late on a London Heathrow Airport to Lambert-St. Louis International Airport flight. Book one of these accommodation options near STL instead:
Grab a Lambert-St. Louis International Airport rental car and explore St Louis and beyond with your own set of wheels. Hertz, Budget and Alamo are well-known companies you can book with here.
For the best deal, book your vehicle from Lambert-St. Louis International Airport about one week in advance.

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

The street address for STL is 10701 Lambert International Blvd..
Lambert-St. Louis International Airport to the centre of St Louis has a drive time of about 20 minutes. It's approximately 26 kilometres away.
If you're travelling by public transport, expect a journey time of about 35 minutes.

When to fly to Lambert-St. Louis International Airport (STL)

It's time to choose your travel dates for your flight from London Heathrow Airport to Lambert-St. Louis International Airport. July is the most popular month to head to St Louis. If you like a more low-key vibe, go in April.
When booking your flight from London Heathrow Airport to Lambert-St. Louis International Airport, think about the kind of weather you like. July is the warmest month in St Louis, with the temperature ranging from 17ºC to 33ºC.
If you want to travel in cooler conditions, look for a cheap ticket from LHR to STL in January. Average temperatures are between -8ºC and 7ºC then.

Explore more of United States

You've visited St Louis, now it's time to discover more of United States. Travel around 418 kilometres north-east to Chicago to tick off its leading attractions. From Millennium Park to Art Institute of Chicago and LandShark Beer Garden at Navy Pier, your itinerary will be busy.
Indianapolis is another essential stop in United States and is around 370 kilometres east of St Louis. No journey is complete without visiting The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.