$436 Cheap American Airlines flights St. Louis (STL) to London (LHR)

View $436 flight on Sat, Apr 18, 2026Opens in a new window

$436 Cheap American Airlines flights St. Louis (STL) to London (LHR)

Prices were available within the past 7 days and start at $436 for one-way flights and $734 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Apr 4 - Sun, Apr 19
STL
St. Louis
LHR
London
$734 Roundtrip, found 5 days ago
$734
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Apr 4 from St. Louis to London, returning Sun, Apr 19, priced at $734 found 5 days ago

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

November is typically the cheapest month to fly

From $517 - $1,461 per traveler.
Flights from St. Louis (STL) to London (LHR)
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
Popular airline
United
Distance
6703 km