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

Return flights

08 Sep - 16 Sep	China Eastern
16 Sep - 23 Sep	Air China
14 Sep - 21 Sep	VietJet Air
25 Sep - 04 Oct	Air China
25 Sep - 29 Sep	VietJet Air
18 Sep - 30 Sep	Singapore Airlines
11 Sep - 16 Sep	Air China
22 Sep - 29 Sep	Air China
15 Sep - 22 Sep	Air China
11 Sep - 18 Sep	Singapore Airlines
14 Sep - 23 Sep	Air China
28 Sep - 09 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 562€

Return flights