AirHint found the following cheapest return flights from Colorado Springs (COS) to San Juan (SJU) in March 2026 (see full year).
Return flights
| 27 Mar - 02 Apr | Allegiant Air | ||
| 26 Mar - 01 Apr | Allegiant Air | ||
| 19 Mar - 26 Mar | Allegiant Air | ||
| 21 Mar - 29 Mar | United |
Also check the deals for one-way flights from Colorado Springs to San Juan in March.
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