Kalispell to Seattle

What the Data Says About FCA to SEA

The Kalispell to Seattle corridor (FCA → SEA) covers roughly 379 miles and is served by 4 carriers, based on Bureau of Transportation Statistics reporting. Across 2,374 flights in the dataset, this route posts a 83.3% on-time rate with an average delay of 63.0 minutes when flights run late. Over the most recent 24 months of BTS data, 2,312 flights were recorded on this pairing — 27 cancelled (1.2%) and 2 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 4 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 2,374 total flights analyzed, the 83.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 63.0-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, May 2021 posted the best performance on this corridor at 97% on-time, while Dec 2022 came in at 57% on-time — a 40-point gap between best and worst recent month. For travelers evaluating the FCA to SEA route, the combination of a 83.3% on-time rate, 63.0-minute average delay, 1.2% recent cancellation rate, and 4 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.