AirHint found the following cheapest return flights from Seoul (GMP) to Shanghai (PVG) in September 2026 (see full year).

Return flights

21 Sep - 23 Sep	Korean Air
10 Sep - 15 Sep	Korean Air
12 Sep - 15 Sep	Korean Air
19 Sep - 22 Sep	Korean Air
10 Sep - 14 Sep	Korean Air
08 Sep - 14 Sep	Korean Air
18 Sep - 22 Sep	Korean Air
20 Sep - 23 Sep	Korean Air
04 Sep - 07 Sep	Korean Air
20 Sep - 08 Oct	Korean Air
01 Sep - 04 Sep	Korean Air
30 Sep - 03 Oct	Korean Air
30 Sep - 04 Oct	Korean Air
10 Sep - 05 Oct	Korean Air
29 Sep - 05 Oct	Korean Air
30 Sep - 05 Oct	Korean Air
26 Sep - 05 Oct	Korean Air
25 Sep - 04 Oct	Korean Air
24 Sep - 11 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 295€

Return flights