Denver to Boise

What the Data Says About DEN to BOI

The Denver to Boise corridor (DEN → BOI) covers roughly 649 miles and is served by 12 carriers, based on Bureau of Transportation Statistics reporting. Across 14,552 flights in the dataset, this route posts a 77.6% on-time rate with an average delay of 61.7 minutes when flights run late. Over the most recent 24 months of BTS data, 5,809 flights were recorded on this pairing — 35 cancelled (0.6%) and 12 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 12 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 14,552 total flights analyzed, the 77.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 61.7-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 2025 posted the best performance on this corridor at 89% on-time, while Jun 2025 came in at 62% on-time — a 27-point gap between best and worst recent month. For travelers evaluating the DEN to BOI route, the combination of a 77.6% on-time rate, 61.7-minute average delay, 0.6% recent cancellation rate, and 12 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.