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

Return flights

22 Sep - 25 Sep	T'way Air
03 Sep - 06 Sep	Air Busan
17 Sep - 20 Sep	Jin Air
04 Sep - 08 Sep	T'way Air
23 Sep - 27 Sep	Air Seoul, Inc
15 Sep - 20 Sep	Air China
15 Sep - 18 Sep	Air China
02 Sep - 06 Sep	Eastar Jet
25 Sep - 29 Sep	Air Busan
18 Sep - 25 Sep	Jeju Air
26 Sep - 12 Oct	Air Busan
26 Sep - 14 Oct	Korean Air
28 Sep - 14 Oct	Korean Air
30 Sep - 14 Oct	Korean Air
26 Sep - 13 Oct	Korean Air
27 Sep - 13 Oct	Korean Air
28 Sep - 13 Oct	Korean Air
30 Sep - 05 Oct	Korean Air
24 Sep - 01 Oct	Korean Air
30 Sep - 01 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 143€

Return flights