AirHint found the following cheapest return flights from Dalian (DLC) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 31 Dec - 07 Jan | China Southern | direct | |
| 30 Dec - 06 Jan | Korean Air | direct | |
| 30 Dec - 04 Jan | China Southern | direct | |
| 31 Dec - 03 Jan | China Southern | direct |
Also check the deals for one-way flights from Dalian to Seoul in December.
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