Cheapest return flights from St. Louis to London in April from 640€

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

Return flights

19 Apr - 29 Apr Frontier Airlines
24 Apr - 28 Apr Lufthansa
25 Apr - 03 May Frontier Airlines
26 Apr - 03 May Lufthansa
23 Apr - 27 Apr Alaska Airlines
25 Apr - 02 May Frontier Airlines
06 Apr - 12 Apr Hawaiian Airlines
02 Apr - 30 Apr Aer Lingus

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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