Seattle to Bozeman

What the Data Says About SEA to BZN

The Seattle to Bozeman corridor (SEA → BZN) covers roughly 543 miles and is served by 10 carriers, based on Bureau of Transportation Statistics reporting. Across 5,417 flights in the dataset, this route posts a 81.1% on-time rate with an average delay of 53.7 minutes when flights run late. Over the most recent 24 months of BTS data, 1,810 flights were recorded on this pairing — 15 cancelled (0.8%) and 3 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 10 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 5,417 total flights analyzed, the 81.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 53.7-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, Dec 2023 posted the best performance on this corridor at 92% on-time, while Jun 2025 came in at 44% on-time — a 47-point gap between best and worst recent month. For travelers evaluating the SEA to BZN route, the combination of a 81.1% on-time rate, 53.7-minute average delay, 0.8% recent cancellation rate, and 10 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.