AirHint found the following cheapest return flights from Colorado Springs (COS) to San Juan (SJU) in May 2026 (see full year).
Return flights
| 14 May - 16 May | Allegiant Air | ||
| 25 May - 30 May | Allegiant Air | ||
| 03 May - 10 May | Allegiant Air | ||
| 13 May - 17 May | Delta | ||
| 26 May - 09 Jun | United |
Also check the deals for one-way flights from Colorado Springs to San Juan in May.
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