AirHint found the following cheapest return flights from Cleveland (CLE) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 04 Dec - 16 Dec | Air Canada | ||
| 11 Dec - 08 Jan | United | ||
| 12 Dec - 10 Jan | Frontier Airlines | ||
| 11 Dec - 07 Jan | United | ||
| 30 Dec - 06 Jan | Delta | ||
| 21 Dec - 03 Jan | Alaska Airlines | ||
| 20 Dec - 03 Jan | Frontier Airlines |
Also check the deals for one-way flights from Cleveland to Seoul in December.
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