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

Return flights

18 Dec - 21 Dec	China Southern
11 Dec - 15 Dec	China Southern
11 Dec - 14 Dec	China Southern
18 Dec - 20 Dec	China Southern
03 Dec - 10 Dec	T'way Air
16 Dec - 18 Dec	Jin Air
20 Dec - 22 Dec	China Southern
04 Dec - 07 Dec	Air China
30 Dec - 22 Jan	Air China
04 Dec - 11 Dec	Jin Air
04 Dec - 06 Dec	Air China
29 Dec - 05 Jan	Asiana Airlines
30 Dec - 02 Jan	Jin Air
30 Dec - 04 Jan	Asiana Airlines
29 Dec - 03 Jan	Asiana Airlines
31 Dec - 05 Jan	Jin Air
30 Dec - 05 Jan	Eastar Jet
31 Dec - 03 Jan	Air China
25 Dec - 01 Jan	Air China
30 Dec - 07 Jan	ANA

Also check the deals for one-way flights from Seoul to Shanghai 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 Shanghai in December from $164

Return flights