AirHint found the following cheapest return flights from Grand Rapids (GRR) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 16 Dec - 16 Jan | United | ||
| 30 Dec - 06 Jan | Allegiant Air | ||
| 23 Dec - 02 Jan | Delta | ||
| 12 Dec - 03 Jan | Delta |
Also check the deals for one-way flights from Grand Rapids to Seoul in December.
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