AirHint found the following cheapest return flights from Kansas City (MCI) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 22 Dec - 29 Dec | Frontier Airlines | ||
| 15 Dec - 13 Jan | United | ||
| 31 Dec - 04 Jan | Hawaiian Airlines | ||
| 20 Dec - 27 Dec | Hawaiian Airlines | ||
| 23 Dec - 02 Jan | Delta | ||
| 22 Dec - 03 Jan | United |
Also check the deals for one-way flights from Kansas City to Seoul in December.
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