Cheapest return flights from St. Louis to London in May from $812

Best time to book flights for St. Louis (STL) to London (LGW) flights at AirHint

AirHint found the following cheapest return flights from St. Louis (STL) to London (LGW) in May 2025 (see full year).

Return flights

24 May - 28 May Frontier Airlines
28 May - 07 Jun Air Canada
15 May - 29 May Frontier Airlines
19 May - 27 May Frontier Airlines
15 May - 05 Jun Frontier Airlines
15 May - 22 May Frontier Airlines
28 May - 08 Jun Air Canada
21 May - 26 May Frontier Airlines
15 May - 27 May Frontier Airlines
31 May - 30 Jun Frontier Airlines
14 May - 18 May Alaska Airlines

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

Skyscanner

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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