AirHint found the following cheapest return flights from San Jose (SJO) to Seoul (ICN) in December 2026 (see full year).
Return flights
| 09 Dec - 10 Jan | United | ||
| 08 Dec - 10 Jan | United | ||
| 08 Dec - 11 Jan | United | ||
| 09 Dec - 11 Jan | United | ||
| 09 Dec - 09 Jan | United | ||
| 12 Dec - 20 Dec | United | ||
| 21 Dec - 04 Jan | Avianca | ||
| 17 Dec - 04 Jan | Qatar Airways |
Also check the deals for one-way flights from San Jose to Seoul in December.
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