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

Return flights

12 Sep - 15 Sep	Jeju Air
17 Sep - 24 Sep	Jin Air
17 Sep - 20 Sep	Jeju Air
10 Sep - 14 Sep	Jeju Air
23 Sep - 26 Sep	Eastar Jet
22 Sep - 25 Sep	Jin Air
19 Sep - 22 Sep	Jin Air
22 Sep - 26 Sep	Jeju Air
02 Sep - 03 Sep	Jeju Air
18 Sep - 21 Sep	Jeju Air
28 Sep - 04 Oct	Eastar Jet
13 Sep - 10 Oct	Eastar Jet
24 Sep - 15 Oct	Korean Air
30 Sep - 05 Oct	Korean Air
29 Sep - 05 Oct	Korean Air
30 Sep - 14 Oct	Korean Air
22 Sep - 21 Oct	Korean Air
27 Sep - 18 Oct	Korean Air
13 Sep - 14 Oct	Korean Air
16 Sep - 22 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 149€

Return flights