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

Return flights

16 Oct - 22 Oct	Jeju Air
21 Oct - 24 Oct	T'way Air
11 Oct - 14 Oct	Eastar Jet
02 Oct - 13 Oct	Jeju Air
03 Oct - 13 Oct	Jeju Air
01 Oct - 04 Oct	Jeju Air
03 Oct - 06 Oct	Jeju Air
02 Oct - 14 Oct	Jeju Air
03 Oct - 14 Oct	Jeju Air
21 Oct - 23 Oct	Korean Air
25 Oct - 01 Nov	Korean Air
29 Oct - 03 Nov	Korean Air
30 Oct - 01 Nov	Air China
08 Oct - 10 Nov	Korean Air
28 Oct - 04 Nov	ANA
30 Oct - 03 Nov	ANA
30 Oct - 06 Nov	ANA
28 Oct - 01 Nov	ANA
31 Oct - 05 Nov	ANA
31 Oct - 04 Nov	ANA

Also check the deals for one-way flights from Seoul to Shanghai in October.

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 October from $212

Return flights