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

Return flights

19 Dec - 03 Jan	China Eastern
05 Dec - 07 Dec	Singapore Airlines
18 Dec - 01 Jan	Singapore Airlines
11 Dec - 16 Dec	Singapore Airlines
19 Dec - 25 Dec	Singapore Airlines
25 Dec - 01 Jan	Singapore Airlines
19 Dec - 28 Dec	Singapore Airlines
19 Dec - 24 Dec	Singapore Airlines

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

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 December from $1154

Return flights