Seattle to Fairbanks

What the Data Says About SEA to FAI

The Seattle to Fairbanks corridor (SEA → FAI) covers roughly 1,533 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 11,703 flights in the dataset, this route posts a 76.4% on-time rate with an average delay of 49.5 minutes when flights run late. Over the most recent 24 months of BTS data, 4,712 flights were recorded on this pairing — 41 cancelled (0.9%) and 3 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 11,703 total flights analyzed, the 76.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 49.5-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, Feb 2024 posted the best performance on this corridor at 91% on-time, while Dec 2025 came in at 56% on-time — a 35-point gap between best and worst recent month. For travelers evaluating the SEA to FAI route, the combination of a 76.4% on-time rate, 49.5-minute average delay, 0.9% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.