AirHint found the following cheapest return flights from Shenzhen (SZX) to Seoul (ICN) in September 2025 (see full year).

Return flights

01 Sep - 12 Sep	Hainan Airlines
01 Sep - 18 Sep	Air China
22 Sep - 24 Sep	Hainan Airlines
01 Sep - 16 Sep	Hainan Airlines
08 Sep - 15 Sep	Hainan Airlines
18 Sep - 25 Sep	China Southern	direct
22 Sep - 24 Sep	China Southern	direct
05 Sep - 21 Sep	China Southern	direct
25 Sep - 27 Sep	China Southern	direct
04 Sep - 07 Sep	China Southern	direct
25 Sep - 07 Oct	Asiana Airlines	direct
26 Sep - 06 Oct	Asiana Airlines	direct
27 Sep - 06 Oct	Xiamen Airlines

Also check the deals for one-way flights from Shenzhen to Seoul 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 Shenzhen to Seoul in September from $239

Return flights