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

Return flights

09 May - 11 May	Eastar Jet
14 May - 21 May	T'way Air
21 May - 26 May	Air China
17 May - 21 May	Air China
13 May - 25 May	T'way Air
18 May - 20 May	Air China
16 May - 19 May	Korean Air
15 May - 18 May	Eastar Jet
15 May - 19 May	Eastar Jet
12 May - 25 May	Eastar Jet
21 May - 06 Jun	Jeju Air
26 May - 02 Jun	Air China
28 May - 01 Jun	Korean Air
30 May - 01 Jun	Korean Air
30 May - 02 Jun	Korean Air
30 May - 04 Jun	Korean Air
30 May - 03 Jun	Korean Air
27 May - 03 Jun	Korean Air
28 May - 05 Jun	Korean Air
23 May - 02 Jun	Korean Air

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

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 May from 158€

Return flights