Seattle to Yakima

What the Data Says About SEA to YKM

The Seattle to Yakima corridor (SEA → YKM) covers roughly 103 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 1,337 flights in the dataset, this route posts a 87.1% on-time rate with an average delay of 53.3 minutes when flights run late. Over the most recent 24 months of BTS data, 1,337 flights were recorded on this pairing — 27 cancelled (2.0%) and 0 diverted (0.0%). 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 1,337 total flights analyzed, the 87.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 53.3-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, Apr 2021 posted the best performance on this corridor at 98% on-time, while Jun 2021 came in at 77% on-time — a 22-point gap between best and worst recent month. For travelers evaluating the SEA to YKM route, the combination of a 87.1% on-time rate, 53.3-minute average delay, 2.0% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.