Ketchikan to Seattle

What the Data Says About KTN to SEA

The Ketchikan to Seattle corridor (KTN → SEA) covers roughly 680 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 7,683 flights in the dataset, this route posts a 86% on-time rate with an average delay of 72.3 minutes when flights run late. Over the most recent 24 months of BTS data, 2,723 flights were recorded on this pairing — 57 cancelled (2.1%) and 1 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 3 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,683 total flights analyzed, the 86% on-time figure is statistically meaningful rather than a small-sample fluke. The 72.3-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 2025 posted the best performance on this corridor at 96% on-time, while Aug 2025 came in at 71% on-time — a 25-point gap between best and worst recent month. For travelers evaluating the KTN to SEA route, the combination of a 86% on-time rate, 72.3-minute average delay, 2.1% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.