Cheap Flights from St. Louis (STL) to London (LHR) from HK$3,103~

View HK$3,103 flight on Sun, 14 Sep 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at HK$3,103 for one-way flights and HK$4,106 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$4,106 Return, found 1 day ago
HK$4,106
Return
found 1 day ago
Select Delta flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$4,106 found 1 day ago
Delta
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$4,106 Return, found 1 day ago
HK$4,106
Return
found 1 day ago
Select Delta flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$4,106 found 1 day ago
Delta
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$4,310 Return, found 1 day ago
HK$4,310
Return
found 1 day ago
Select Delta flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$4,310 found 1 day ago
United
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$5,048 Return, found 1 day ago
HK$5,048
Return
found 1 day ago
Select United flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$5,048 found 1 day ago
Air Canada
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$5,058 Return, found 1 day ago
HK$5,058
Return
found 1 day ago
Select Air Canada flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$5,058 found 1 day ago
Air Canada
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$5,102 Return, found 1 day ago
HK$5,102
Return
found 1 day ago
Select Air Canada flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$5,102 found 1 day ago
Air Canada
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$5,112 Return, found 1 day ago
HK$5,112
Return
found 1 day ago
Select Air Canada flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$5,112 found 1 day ago
Delta
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$5,397 Return, found 1 day ago
HK$5,397
Return
found 1 day ago
Select Delta flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$5,397 found 1 day ago
Air France
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$6,351 Return, found 1 day ago
HK$6,351
Return
found 1 day ago
Select Air France flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$6,351 found 1 day ago
American Airlines
Sun, 14 Sep - Tue, 30 Sep
STL
St. Louis
LHR
London
HK$6,618 Return, found 1 day ago
HK$6,618
Return
found 1 day ago
Select American Airlines flight, departing Sun, 14 Sep from St. Louis to London, returning Tue, 30 Sep, priced at HK$6,618 found 1 day ago

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

August is typically the cheapest month to fly

From HK$4,176 - HK$14,368 per traveller.

Graph displaying average flight prices per month

St. Louis to London route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, Delta, Iberia, Lufthansa, United
Return price
HK$4,106
Distance
6703 km

Flights from St. Louis to London

Book cheap flights from St. Louis (STL) to London (LHR) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from St. Louis (STL) to London (LHR) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your St. Louis (STL) to London (LHR) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your London flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in London and things to do in London for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to London more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to London is HK$3,103 now!

 

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 HK$4,106. 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 kilometers 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 cozy 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.

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