Cheapest return flights from St. Louis to London in April from $564

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

Return flights

15 Apr - 21 Apr Air Canada
22 Apr - 28 Apr Lufthansa
20 Apr - 29 Apr Air Canada
15 Apr - 22 Apr Aer Lingus
21 Apr - 28 Apr Air France
19 Apr - 28 Apr Frontier Airlines
21 Apr - 29 Apr Aer Lingus
20 Apr - 30 Apr Aer Lingus
19 Apr - 29 Apr Frontier Airlines
06 Apr - 12 Apr Aer Lingus

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

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