AirHint found the following cheapest return flights from Seoul (GMP) to Taipei (TPE) in December 2025 (see full year).

Return flights

10 Dec - 16 Dec	Jeju Air
10 Dec - 17 Dec	Jeju Air
09 Dec - 16 Dec	Air Busan
08 Dec - 17 Dec	Eastar Jet
02 Dec - 03 Dec	Eastar Jet
04 Dec - 08 Dec	Eastar Jet
10 Dec - 18 Dec	Jeju Air
12 Dec - 16 Dec	T'way Air
08 Dec - 15 Dec	Eastar Jet
13 Dec - 16 Dec	Jeju Air
03 Dec - 18 Jan	Jeju Air
23 Dec - 04 Jan	Jin Air
30 Dec - 05 Jan	Jin Air
30 Dec - 04 Jan	Jin Air
29 Dec - 07 Jan	Air Busan
24 Dec - 03 Jan	Jeju Air
25 Dec - 28 Jan	Jin Air
31 Dec - 07 Jan	Asiana Airlines
29 Dec - 06 Jan	Air Busan
24 Dec - 02 Jan	Jeju Air

Also check the deals for one-way flights from Seoul to Taipei 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 Seoul to Taipei in December from $143

Return flights