Phoenix to Seattle

What the Data Says About PHX to SEA

The Phoenix to Seattle corridor (PHX → SEA) covers roughly 1,107 miles and is served by 43 carriers, based on Bureau of Transportation Statistics reporting. Across 38,561 flights in the dataset, this route posts a 84.3% on-time rate with an average delay of 63.3 minutes when flights run late. Over the most recent 24 months of BTS data, 14,522 flights were recorded on this pairing — 90 cancelled (0.6%) and 18 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 43 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 38,561 total flights analyzed, the 84.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 63.3-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, Oct 2024 posted the best performance on this corridor at 90% on-time, while Jul 2024 came in at 69% on-time — a 21-point gap between best and worst recent month. For travelers evaluating the PHX to SEA route, the combination of a 84.3% on-time rate, 63.3-minute average delay, 0.6% recent cancellation rate, and 43 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.