Seattle to Honolulu

What the Data Says About SEA to HNL

The Seattle to Honolulu corridor (SEA → HNL) covers roughly 2,677 miles and is served by 7 carriers, based on Bureau of Transportation Statistics reporting. Across 14,550 flights in the dataset, this route posts a 76.3% on-time rate with an average delay of 66.5 minutes when flights run late. Over the most recent 24 months of BTS data, 5,904 flights were recorded on this pairing — 69 cancelled (1.2%) and 54 diverted (0.9%). Those baseline metrics tell you what to expect before you book.

Having 7 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 14,550 total flights analyzed, the 76.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 66.5-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, Mar 2024 posted the best performance on this corridor at 84% on-time, while Jul 2025 came in at 52% on-time — a 32-point gap between best and worst recent month. For travelers evaluating the SEA to HNL route, the combination of a 76.3% on-time rate, 66.5-minute average delay, 1.2% recent cancellation rate, and 7 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.