AirHint found the following cheapest one-way flights from Seoul (ICN) to San Jose (SJO) in December 2025 (see full year).
One-Way flights
| 11 Dec | T'way Air | ||
| 13 Dec | T'way Air | ||
| 14 Dec | T'way Air | ||
| 10 Dec | Air Premia | ||
| 12 Dec | Air Premia | ||
| 15 Dec | Air Premia | ||
| 16 Dec | T'way Air | ||
| 22 Dec | Air Canada | ||
| 01 Dec | Air Canada | ||
| 20 Dec | Air Canada |
Also check the deals for return flights from Seoul to San Jose in December.
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