Portland to Boise

What the Data Says About PDX to BOI

The Portland to Boise corridor (PDX → BOI) covers roughly 344 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 5,377 flights in the dataset, this route posts a 87.3% on-time rate with an average delay of 63.7 minutes when flights run late. Over the most recent 24 months of BTS data, 2,029 flights were recorded on this pairing — 10 cancelled (0.5%) and 0 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 5,377 total flights analyzed, the 87.3% 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 2025 posted the best performance on this corridor at 94% on-time, while Aug 2024 came in at 76% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the PDX to BOI route, the combination of a 87.3% on-time rate, 63.7-minute average delay, 0.5% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.