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

Return flights

05 Sep - 12 Sep	Air China
11 Sep - 18 Sep	Air China
06 Sep - 12 Sep	Air China
13 Sep - 14 Oct	Air China
12 Sep - 19 Sep	Air China
30 Sep - 10 Oct	Singapore Airlines
15 Sep - 23 Sep	Air China
15 Sep - 15 Oct	Air China
27 Sep - 18 Oct	Air China
09 Sep - 13 Oct	Air China
07 Sep - 13 Oct	Air China
26 Sep - 13 Oct	Air China
29 Sep - 10 Oct	Air China
27 Sep - 13 Oct	Air China
27 Sep - 07 Oct	Air China

Also check the deals for one-way flights from Busan to London in September.

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 September from 683€

Return flights