American Airlines flights to London from St. Louis

View S$671 flight on Sun, 26 Apr, 2026Opens in a new window
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American Airlines flights from St. Louis to London (STL→LON)

Prices were available within the past 7 days and start at S$671 for one-way flights and S$1,122 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, 26 Apr - Tue, 5 May
STL
St. Louis
LHR
London
S$1,122 Return, found 3 days ago
S$1,122
Return
found 3 days ago
Select American Airlines flight, departing Sun, 26 Apr from St. Louis to London, returning Tue, 5 May, priced at S$1,122 found 3 days ago
American Airlines
Fri, 26 Dec - Tue, 30 Dec
STL
St. Louis
LHR
London
S$1,823 Return, found 18 hours ago
S$1,823
Return
found 18 hours ago
Select American Airlines flight, departing Fri, 26 Dec from St. Louis to London, returning Tue, 30 Dec, priced at S$1,823 found 18 hours ago
American Airlines
Fri, 26 Dec - Tue, 30 Dec
STL
St. Louis
LHR
London
S$1,837 Return, found 18 hours ago
S$1,837
Return
found 18 hours ago
Select American Airlines flight, departing Fri, 26 Dec from St. Louis to London, returning Tue, 30 Dec, priced at S$1,837 found 18 hours ago

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

September is typically the cheapest month to fly

From S$664 - S$1,995 per traveller.
St. Louis to London route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Heathrow
Distance
6703 km
*Available to Expedia members.