Phoenix to Santa Rosa

What the Data Says About PHX to STS

The Phoenix to Santa Rosa corridor (PHX → STS) covers roughly 699 miles and is served by 10 carriers, based on Bureau of Transportation Statistics reporting. Across 2,725 flights in the dataset, this route posts a 85.1% on-time rate with an average delay of 63.7 minutes when flights run late. Over the most recent 24 months of BTS data, 1,146 flights were recorded on this pairing — 3 cancelled (0.3%) and 11 diverted (1.0%). Those baseline metrics tell you what to expect before you book.

Having 10 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 2,725 total flights analyzed, the 85.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 63.7-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, Apr 2024 posted the best performance on this corridor at 91% on-time, while Jul 2025 came in at 62% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the PHX to STS route, the combination of a 85.1% on-time rate, 63.7-minute average delay, 0.3% recent cancellation rate, and 10 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.