Denver to Alamosa

What the Data Says About DEN to ALS

The Denver to Alamosa corridor (DEN → ALS) covers roughly 179 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 979 flights in the dataset, this route posts a 87.8% on-time rate with an average delay of 135.1 minutes when flights run late. Over the most recent 24 months of BTS data, 979 flights were recorded on this pairing — 37 cancelled (3.8%) and 2 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 979 total flights analyzed, the 87.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 135.1-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Nov 2021 posted the best performance on this corridor at 98% on-time, while Jul 2021 came in at 72% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the DEN to ALS route, the combination of a 87.8% on-time rate, 135.1-minute average delay, 3.8% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.