£403 Cheap Flights from London (LHR) to St. Louis (STL)

View £403 flight on Wed, 25 Nov 2026Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from London (LHR) to St. Louis (STL)

Prices were available within the past 7 days and start at £403 for one-way flights and £642 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Mon, 14 Sept - Mon, 21 Sept
LHR
London
STL
St. Louis
£642 Return, found 1 day ago
£642
Return
found 1 day ago
Select Lufthansa flight, departing Mon, 14 Sept from London to St. Louis, returning Mon, 21 Sept, priced at £642 found 1 day ago
Lufthansa
Wed, 2 Sept - Tue, 15 Sept
LHR
London
STL
St. Louis
£642 Return, found 15 hours ago
£642
Return
found 15 hours ago
Select Lufthansa flight, departing Wed, 2 Sept from London to St. Louis, returning Tue, 15 Sept, priced at £642 found 15 hours ago
Lufthansa
Tue, 8 Sept - Tue, 15 Sept
LHR
London
STL
St. Louis
£644 Return, just found
£644
Return
just found
Select Lufthansa flight, departing Tue, 8 Sept from London to St. Louis, returning Tue, 15 Sept, priced at £644 just found
American Airlines
Wed, 2 Sept - Tue, 15 Sept
LHR
London
STL
St. Louis
£644 Return, found 15 hours ago
£644
Return
found 15 hours ago
Select American Airlines flight, departing Wed, 2 Sept from London to St. Louis, returning Tue, 15 Sept, priced at £644 found 15 hours ago
British Airways
Wed, 16 Sept - Tue, 29 Sept
LHR
London
STL
St. Louis
£645 Return, just found
£645
Return
just found
Select British Airways flight, departing Wed, 16 Sept from London to St. Louis, returning Tue, 29 Sept, priced at £645 just found
Lufthansa
Wed, 23 Sept - Sat, 26 Sept
LHR
London
STL
St. Louis
£646 Return, found 1 day ago
£646
Return
found 1 day ago
Select Lufthansa flight, departing Wed, 23 Sept from London to St. Louis, returning Sat, 26 Sept, priced at £646 found 1 day ago
Finnair
Wed, 2 Sept - Wed, 23 Sept
LHR
London
STL
St. Louis
£647 Return, found 13 hours ago
£647
Return
found 13 hours ago
Select Finnair flight, departing Wed, 2 Sept from London to St. Louis, returning Wed, 23 Sept, priced at £647 found 13 hours ago
Iberia
Wed, 23 Sept - Thu, 1 Oct
LHR
London
STL
St. Louis
£649 Return, found 1 day ago
£649
Return
found 1 day ago
Select Iberia flight, departing Wed, 23 Sept from London to St. Louis, returning Thu, 1 Oct, priced at £649 found 1 day ago
KLM
Sun, 6 Sept - Sun, 13 Sept
LHR
London
STL
St. Louis
£652 Return, found 4 days ago
£652
Return
found 4 days ago
Select KLM flight, departing Sun, 6 Sept from London to St. Louis, returning Sun, 13 Sept, priced at £652 found 4 days ago
Air France
Sun, 27 Sept - Tue, 6 Oct
LHR
London
STL
St. Louis
£657 Return, found 6 days ago
£657
Return
found 6 days ago
Select Air France flight, departing Sun, 27 Sept from London to St. Louis, returning Tue, 6 Oct, priced at £657 found 6 days ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from £868
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city centre20 min
Flights from £868

Frequently asked questions

How much does a flight from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
One-way flights typically cost between £417 and £869 and return flights often range between £618 and £3,196. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when LHR to STL ticket fares go up or down.
Which airlines fly direct from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter LHR to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How long does it take to fly from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Direct flights from LHR to STL usually take about 9 hours, traveling roughly 4,190 miles. If you opt for a connecting flight, expect to add around 5 hours 50 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from London (LHR-Heathrow) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Select the "Business class" and "First class" filters when looking for LHR to STL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
What airports do you fly into for St. Louis from Heathrow (LHR)?
If you're planning to travel to St. Louis from Heathrow (LHR), you can fly directly into Lambert-St. Louis Intl. (STL) Some flights may connect through major hubs like Schiphol (AMS), Roissy-Charles de Gaulle (CDG), John F. Kennedy Intl. (JFK) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Travel information

Origin airport
Heathrow
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Return price
£641
Distance
6703 km
Average flight time
9 hours 5 mins

Book with confidence

Compare flights from London to St. Louis easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to St. Louis. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Lambert-St. Louis Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Heathrow to Lambert-St. Louis Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Heathrow (LHR) to Lambert-St. Louis Intl. (STL)

The easiest way to view the best deals on flights from London to St. Louis today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Heathrow to Lambert-St. Louis Intl. start at just £642 and range up to £657.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and St. Louis
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to St. Louis flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to Lambert-St. Louis Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to St. Louis easily and book with confidence

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