€393 Cheap Flights St. Louis to London (STL-LHR)

View €393 flight on Mon, 20 Oct 2025Opens in a new window

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

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 15% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at €393 for one-way flights and €444 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€444 Return, found 6 days ago
€444
Return
found 6 days ago
Select Delta flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €444 found 6 days ago
Virgin Atlantic
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€444 Return, found 6 days ago
€444
Return
found 6 days ago
Select Virgin Atlantic flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €444 found 6 days ago
Delta
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€466 Return, found 6 days ago
€466
Return
found 6 days ago
Select Delta flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €466 found 6 days ago
Delta
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€488 Return, found 6 days ago
€488
Return
found 6 days ago
Select Delta flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €488 found 6 days ago
British Airways
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€529 Return, found 6 days ago
€529
Return
found 6 days ago
Select British Airways flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €529 found 6 days ago
United
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€535 Return, found 6 days ago
€535
Return
found 6 days ago
Select United flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €535 found 6 days ago
Air Canada
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€541 Return, found 6 days ago
€541
Return
found 6 days ago
Select Air Canada flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €541 found 6 days ago
United
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€545 Return, found 6 days ago
€545
Return
found 6 days ago
Select United flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €545 found 6 days ago
Air Canada
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€546 Return, found 6 days ago
€546
Return
found 6 days ago
Select Air Canada flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €546 found 6 days ago
United
Sun, 28 Sept - Tue, 14 Oct
STL
St. Louis
LHR
London
€551 Return, found 6 days ago
€551
Return
found 6 days ago
Select United flight, departing Sun, 28 Sept from St. Louis to London, returning Tue, 14 Oct, priced at €551 found 6 days ago

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

January is typically the cheapest month to fly

From €443 - €1,372 per traveller.

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to LHR?
Pack your bags, because round-trip flights between STL and LHR start from €444. That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can go up quickly, so book now to lock in the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert-St. Louis Intl. Airport (STL) to London Heathrow?
This can differ between air carriers, as each one has its own terms and conditions. Visit the Customer Service Portal, where there are easy instructions on how to cancel online.
How do I find cheap flights from St. Louis Lambert International Airport to Heathrow 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 Lambert-St. Louis Intl. Airport (STL) to Heathrow Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from St. Louis Lambert International Airport to LHR?
With around 6,800 kilometres separating St. Louis and Hounslow, your flight will be a long one. Pack wisely to make your time in the air comfortable. Things like a spare pair of socks and a cosy travel pillow should be in your hand luggage.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to London Heathrow?
Unfortunately, there aren't any airlines that fly directly between St. Louis Lambert International Airport and Heathrow Airport. You'll need to book a flight with one or more stops.
Are Lambert-St. Louis Intl. Airport (STL) to Heathrow Airport (LHR) flight tickets cheaper when they're purchased at the last minute?
It is possible to get an awesome last-minute deal from Lambert Field to Heathrow Airport, but it's also possible to miss out altogether! As many airlines release prices up to 12 months in advance, it's worthwhile keeping an eye on fares early and being ready to pounce when you see a bargain. Expedia compares air carrier prices and updates flight deals frequently, so you can rest easy knowing you're always seeing the latest offers.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Iberia, KLM, Lufthansa, United, Virgin Atlantic
Return price
€443
Distance
6703 km

Book with confidence

Book with confidence

Perfect flights from St. Louis to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from St. Louis to London. 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 Lambert-St. Louis Intl. to Heathrow ticket options cater to your travel preferences, with incredible one-way fares from €393 and roundtrip prices from €444. 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 Heathrow 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 London.
Perfect flights from St. Louis to London

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to Expedia members.