€876 Cheap Flights London to St. Louis (LHR-STL)

View €876 flight on Mon, 8 Sep 2025Opens in a new window

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

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Cheap flights from London to St. Louis (LHR-STL)

Prices were available within the past 7 days and start at €876 for one-way flights and €729 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sat, 4 Oct - Sat, 11 Oct
LHR
London
STL
St. Louis
€729 Return, found 2 days ago
€729
Return
found 2 days ago
Select Air Canada flight, departing Sat, 4 Oct from London to St. Louis, returning Sat, 11 Oct, priced at €729 found 2 days ago
Air Canada
Fri, 19 Sep - Fri, 26 Sep
LHR
London
STL
St. Louis
€735 Return, found 1 day ago
€735
Return
found 1 day ago
Select Air Canada flight, departing Fri, 19 Sep from London to St. Louis, returning Fri, 26 Sep, priced at €735 found 1 day ago
Air Canada
Mon, 15 Sep - Mon, 22 Sep
LHR
London
STL
St. Louis
€738 Return, found 6 days ago
€738
Return
found 6 days ago
Select Air Canada flight, departing Mon, 15 Sep from London to St. Louis, returning Mon, 22 Sep, priced at €738 found 6 days ago
Air Canada
Fri, 19 Sep - Fri, 26 Sep
LHR
London
STL
St. Louis
€740 Return, found 1 day ago
€740
Return
found 1 day ago
Select Air Canada flight, departing Fri, 19 Sep from London to St. Louis, returning Fri, 26 Sep, priced at €740 found 1 day ago
Air Canada
Fri, 29 Aug - Thu, 11 Sep
LHR
London
STL
St. Louis
€762 Return, found 4 days ago
€762
Return
found 4 days ago
Select Air Canada flight, departing Fri, 29 Aug from London to St. Louis, returning Thu, 11 Sep, priced at €762 found 4 days ago
Swiss International Air Lines
Mon, 15 Sep - Mon, 22 Sep
LHR
London
STL
St. Louis
€805 Return, found 6 days ago
€805
Return
found 6 days ago
Select Swiss International Air Lines flight, departing Mon, 15 Sep from London to St. Louis, returning Mon, 22 Sep, priced at €805 found 6 days ago
Lufthansa
Fri, 29 Aug - Thu, 11 Sep
LHR
London
STL
St. Louis
€806 Return, found 4 days ago
€806
Return
found 4 days ago
Select Lufthansa flight, departing Fri, 29 Aug from London to St. Louis, returning Thu, 11 Sep, priced at €806 found 4 days ago
Swiss International Air Lines
Mon, 15 Sep - Mon, 22 Sep
LHR
London
STL
St. Louis
€807 Return, found 6 days ago
€807
Return
found 6 days ago
Select Swiss International Air Lines flight, departing Mon, 15 Sep from London to St. Louis, returning Mon, 22 Sep, priced at €807 found 6 days ago
Austrian Airlines
Fri, 29 Aug - Thu, 11 Sep
LHR
London
STL
St. Louis
€836 Return, found 4 days ago
€836
Return
found 4 days ago
Select Austrian Airlines flight, departing Fri, 29 Aug from London to St. Louis, returning Thu, 11 Sep, priced at €836 found 4 days ago
Brussels Airlines
Mon, 15 Sep - Mon, 22 Sep
LHR
London
STL
St. Louis
€837 Return, found 6 days ago
€837
Return
found 6 days ago
Select Brussels Airlines flight, departing Mon, 15 Sep from London to St. Louis, returning Mon, 22 Sep, priced at €837 found 6 days ago

Find the cheapest month to fly from London (LHR) to St. Louis (STL)

January is typically the cheapest month to fly

From €606 - €1,634 per traveller.

Graph displaying average flight prices per month

London to St. Louis route information
Origin airport
Heathrow
Destination airport
Lambert-St. Louis Intl.
Return price
€728
Distance
6703 km

Perfect flights from London to St. Louis

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from London to St. Louis. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Heathrow to Lambert-St. Louis Intl. ticket options cater to your travel preferences, with incredible one-way fares from €876 and roundtrip prices from €729. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Lambert-St. Louis Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in St. Louis.

Frequently asked questions

How much is a flight from Heathrow Airport (LHR) to Lambert Field?
The lowest price advertised for a round-trip flight from London Heathrow to Lambert-St. Louis Intl. Airport (STL) is €729. But you better move fast. This price is based on fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Heathrow Airport (LHR) to Lambert-St. Louis Intl. Airport (STL)?
This differs between airlines, as each has its own terms and conditions. Head to the Customer Service Portal, where there are instructions on how to cancel online.
How do I find cheap flights from Heathrow Airport to St. Louis Lambert International Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for LHR to STL flights, you'll see a "no change fees" filter for you to select.
How far is the flight from LHR to Lambert-St. Louis Intl. Airport (STL)?
The distance is around 6,800 kilometres. Travel pillow? Check. Toiletries? Check. We suggest you pack all the essentials for this long-haul Hounslow to St. Louis flight.
Which airlines fly direct from LHR to Lambert-St. Louis Intl. Airport (STL)?
Flying directly between Heathrow Airport (LHR) and Lambert Field isn't possible at this time. However, you'll still be able to book a flight to St. Louis with at least one stop.
Are Heathrow Airport (LHR) to Lambert-St. Louis Intl. Airport (STL) flight tickets cheaper when they're purchased at the last minute?
It is possible to find a fantastic last-minute deal from London Heathrow to Lambert Field, but it's also possible to miss out altogether! As many airlines advertise prices up to 12 months in advance, it's worth keeping an eye on fares early and being ready to book when you spot a good bargain. Expedia compares air carrier prices and updates flight deals all the time, so you can rest easy knowing you're always getting the latest offers.

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