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

Return flights

18 Sep - 22 Sep	Jin Air
04 Sep - 07 Sep	T'way Air
15 Sep - 22 Sep	Jeju Air
14 Sep - 21 Sep	Jeju Air
05 Sep - 07 Sep	Jin Air
14 Sep - 17 Sep	Jeju Air
13 Sep - 16 Sep	Air China
01 Sep - 26 Sep	Jin Air
20 Sep - 21 Sep	Jeju Air
19 Sep - 23 Sep	T'way Air
29 Sep - 06 Oct	Jeju Air
11 Sep - 30 Oct	Korean Air
07 Sep - 16 Oct	Korean Air
27 Sep - 14 Oct	Korean Air
27 Sep - 18 Oct	Korean Air
16 Sep - 16 Oct	Korean Air
27 Sep - 03 Oct	Korean Air
27 Sep - 02 Oct	Korean Air
29 Sep - 12 Oct	Korean Air
25 Sep - 12 Oct	Korean Air

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

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 September from $160

Return flights