Phoenix to Boise

What the Data Says About PHX to BOI

The Phoenix to Boise corridor (PHX → BOI) covers roughly 735 miles and is served by 45 carriers, based on Bureau of Transportation Statistics reporting. Across 9,070 flights in the dataset, this route posts a 81.5% on-time rate with an average delay of 67.5 minutes when flights run late. Over the most recent 24 months of BTS data, 3,793 flights were recorded on this pairing — 6 cancelled (0.2%) and 8 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 45 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,070 total flights analyzed, the 81.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 67.5-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, Apr 2024 posted the best performance on this corridor at 90% on-time, while Jun 2024 came in at 65% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the PHX to BOI route, the combination of a 81.5% on-time rate, 67.5-minute average delay, 0.2% recent cancellation rate, and 45 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.