AirHint found the following cheapest return flights from Denver (DEN) to San Jose (SJO) in March 2026 (see full year).
Return flights
| 06 Mar - 09 Mar | American Airlines | ||
| 04 Mar - 08 Mar | American Airlines | ||
| 18 Mar - 23 Mar | American Airlines | ||
| 13 Mar - 16 Mar | American Airlines | ||
| 07 Mar - 21 Mar | Avianca | ||
| 14 Mar - 21 Mar | jetBlue |
Also check the deals for one-way flights from Denver to San Jose in March.
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