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

Return flights

23 Oct - 03 Nov	Frontier Airlines
03 Oct - 06 Oct	Frontier Airlines
05 Oct - 15 Oct	Frontier Airlines
03 Oct - 10 Oct	Southern Airways Express
02 Oct - 05 Oct	Frontier Airlines
14 Oct - 16 Oct	Frontier Airlines
12 Oct - 18 Oct	Frontier Airlines
30 Oct - 03 Nov	Spirit Airlines
13 Oct - 18 Oct	Southern Airways Express
16 Oct - 22 Oct	Southern Airways Express
30 Oct - 02 Nov	Spirit Airlines
02 Oct - 07 Oct	Alaska Airlines

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

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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Cheapest return flights from St. Louis to London in October from $600

Return flights