AirHint found the following cheapest return flights from Kansas City (MCI) to San Jose (SJO) in December 2025 (see full year).
Return flights
| 10 Dec - 14 Dec | American Airlines | ||
| 26 Dec - 06 Jan | Frontier Airlines | ||
| 27 Dec - 05 Jan | Frontier Airlines | ||
| 26 Dec - 04 Jan | Spirit Airlines |
Also check the deals for one-way flights from Kansas City to San Jose in December.
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