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

Return flights

03 Sep - 22 Oct	Air China
19 Sep - 26 Sep	China Southern
02 Sep - 19 Sep	China Eastern
14 Sep - 22 Sep	Air China
02 Sep - 22 Sep	easyJet
08 Sep - 19 Sep	China Eastern
01 Sep - 22 Sep	China Eastern
02 Sep - 14 Oct	China Eastern
02 Sep - 21 Oct	Air China
04 Sep - 21 Oct	Air China
09 Sep - 21 Oct	China Eastern
19 Sep - 04 Oct	Air China
08 Sep - 18 Sep	Qatar Airways
05 Sep - 20 Sep	Air China
08 Sep - 21 Oct	Air China

Also check the deals for one-way flights from London to Busan 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 London to Busan in September from $542

Return flights