Seattle to Pullman

What the Data Says About SEA to PUW

The Seattle to Pullman corridor (SEA → PUW) covers roughly 250 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 1,990 flights in the dataset, this route posts a 88% on-time rate with an average delay of 55.0 minutes when flights run late. Over the most recent 24 months of BTS data, 1,990 flights were recorded on this pairing — 42 cancelled (2.1%) and 6 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 1,990 total flights analyzed, the 88% on-time figure is statistically meaningful rather than a small-sample fluke. The 55.0-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 2021 posted the best performance on this corridor at 97% on-time, while Dec 2022 came in at 74% on-time — a 23-point gap between best and worst recent month. For travelers evaluating the SEA to PUW route, the combination of a 88% on-time rate, 55.0-minute average delay, 2.1% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.