Anchorage to Seattle

What the Data Says About ANC to SEA

The Anchorage to Seattle corridor (ANC → SEA) covers roughly 1,448 miles and is served by 10 carriers, based on Bureau of Transportation Statistics reporting. Across 41,064 flights in the dataset, this route posts a 85.8% on-time rate with an average delay of 61.1 minutes when flights run late. Over the most recent 24 months of BTS data, 14,464 flights were recorded on this pairing — 155 cancelled (1.1%) and 12 diverted (0.1%). 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 41,064 total flights analyzed, the 85.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 61.1-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 2024 posted the best performance on this corridor at 91% on-time, while Jul 2024 came in at 76% on-time — a 15-point gap between best and worst recent month. For travelers evaluating the ANC to SEA route, the combination of a 85.8% on-time rate, 61.1-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.