AirHint found the following cheapest return flights from Busan (PUS) to London (LHR) in October 2025 (see full year).

Return flights

22 Oct - 10 Nov	Air China
18 Oct - 02 Nov	Air China
12 Oct - 27 Oct	Vietnam Airlines
20 Oct - 24 Oct	Air China
13 Oct - 17 Oct	Air China
13 Oct - 16 Oct	Air China
10 Oct - 13 Oct	China Airlines
05 Oct - 13 Oct	China Airlines
13 Oct - 24 Oct	China Airlines
07 Oct - 17 Oct	China Airlines
05 Oct - 11 Oct	China Airlines
01 Oct - 12 Oct	Vietnam Airlines

Also check the deals for one-way flights from Busan 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 Busan to London in October from $714

Return flights