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

Return flights

29 Oct - 05 Nov	Jin Air
28 Oct - 04 Nov	T'way Air
29 Oct - 04 Nov	Jin Air
31 Oct - 02 Nov	T'way Air
31 Oct - 06 Nov	Jin Air
28 Oct - 03 Nov	Air China
27 Oct - 03 Nov	Jin Air
30 Oct - 04 Nov	Jin Air
27 Oct - 30 Oct	Jin Air
27 Oct - 01 Nov	Jin Air
28 Oct - 31 Oct	Jin Air
27 Oct - 31 Oct	T'way Air
30 Oct - 06 Nov	Eastar Jet
25 Oct - 29 Oct	T'way Air
25 Oct - 28 Oct	Eastar Jet
28 Oct - 29 Oct	Air China
25 Oct - 27 Oct	Eastar Jet
25 Oct - 26 Oct	Eastar Jet
30 Oct - 31 Oct	Air China
29 Oct - 29 Oct	Korean Air

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 171€

Return flights