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

Return flights

04 Sep - 08 Sep	China Eastern
11 Sep - 22 Sep	Air China
24 Sep - 28 Sep	China Eastern
22 Sep - 03 Oct	China Eastern
22 Sep - 02 Oct	China Eastern
22 Sep - 04 Oct	Air China
01 Sep - 07 Sep	Air China
20 Sep - 27 Sep	Air China
11 Sep - 18 Sep	Air China
13 Sep - 15 Sep	Air China
05 Sep - 12 Sep	Air China
22 Sep - 29 Sep	Air China
14 Sep - 23 Sep	Air China
22 Sep - 05 Oct	China Eastern
29 Sep - 06 Oct	China Eastern
27 Sep - 05 Oct	Singapore Airlines
30 Sep - 05 Oct	Air China
12 Sep - 10 Oct	Air China
30 Sep - 11 Oct	Air China
29 Sep - 10 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 508€

Return flights