Bozeman to Seattle

What the Data Says About BZN to SEA

The Bozeman to Seattle corridor (BZN → SEA) covers roughly 543 miles and is served by 10 carriers, based on Bureau of Transportation Statistics reporting. Across 5,414 flights in the dataset, this route posts a 81% on-time rate with an average delay of 59.3 minutes when flights run late. Over the most recent 24 months of BTS data, 1,807 flights were recorded on this pairing — 19 cancelled (1.1%) and 4 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 5,414 total flights analyzed, the 81% on-time figure is statistically meaningful rather than a small-sample fluke. The 59.3-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, Dec 2023 posted the best performance on this corridor at 90% on-time, while Jun 2025 came in at 60% on-time — a 30-point gap between best and worst recent month. For travelers evaluating the BZN to SEA route, the combination of a 81% on-time rate, 59.3-minute average delay, 1.1% recent cancellation rate, and 10 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.