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

Return flights

24 Dec - 01 Jan	China Eastern
25 Dec - 28 Dec	Air China
20 Dec - 31 Dec	Air China
25 Dec - 29 Dec	Air China
21 Dec - 27 Dec	Air China
24 Dec - 05 Jan	Air China
25 Dec - 05 Jan	Air China
25 Dec - 06 Jan	Air China
25 Dec - 04 Jan	Air China
20 Dec - 23 Dec	Air China
24 Dec - 28 Dec	Air China
20 Dec - 29 Dec	Air China
20 Dec - 30 Dec	Air China
22 Dec - 29 Dec	Air China
19 Dec - 27 Dec	Air China
25 Dec - 01 Jan	Air China
26 Dec - 01 Jan	Air China
20 Dec - 01 Jan	Air China
20 Dec - 25 Jan	Korean Air	direct
28 Dec - 05 Jan	Korean Air	direct

Also check the deals for one-way flights from Shenzhen to Seoul in December.

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 December from 186€

Return flights