Cheapest return flights from St. Louis to London in April from $630

AirHint found the following cheapest return flights from St. Louis (STL) to London (STN) in April 2026 (see full year).

Return flights

22 Apr - 28 Apr Lufthansa
21 Apr - 29 Apr Hawaiian Airlines
19 Apr - 29 Apr Hawaiian Airlines
15 Apr - 21 Apr Hawaiian Airlines
23 Apr - 05 May Air Canada
02 Apr - 30 Apr Frontier Airlines
19 Apr - 26 Apr Lufthansa
04 Apr - 11 Apr Aer Lingus
19 Apr - 28 Apr Lufthansa
06 Apr - 12 Apr Iberia

Also check the deals for one-way flights from St. Louis to London in April.

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