Boise to Phoenix

What the Data Says About BOI to PHX

The Boise to Phoenix corridor (BOI → PHX) covers roughly 735 miles and is served by 45 carriers, based on Bureau of Transportation Statistics reporting. Across 9,042 flights in the dataset, this route posts a 84.9% on-time rate with an average delay of 85.7 minutes when flights run late. Over the most recent 24 months of BTS data, 3,789 flights were recorded on this pairing — 10 cancelled (0.3%) and 5 diverted (0.1%). 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 9,042 total flights analyzed, the 84.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 85.7-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 2024 posted the best performance on this corridor at 91% on-time, while Aug 2024 came in at 73% on-time — a 17-point gap between best and worst recent month. For travelers evaluating the BOI to PHX route, the combination of a 84.9% on-time rate, 85.7-minute average delay, 0.3% recent cancellation rate, and 45 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.