Palm Springs to Seattle

What the Data Says About PSP to SEA

The Palm Springs to Seattle corridor (PSP → SEA) covers roughly 987 miles and is served by 16 carriers, based on Bureau of Transportation Statistics reporting. Across 9,558 flights in the dataset, this route posts a 86.8% on-time rate with an average delay of 65.0 minutes when flights run late. Over the most recent 24 months of BTS data, 3,319 flights were recorded on this pairing — 46 cancelled (1.4%) and 6 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 16 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,558 total flights analyzed, the 86.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 65.0-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, Sep 2025 posted the best performance on this corridor at 94% on-time, while Aug 2024 came in at 74% on-time — a 20-point gap between best and worst recent month. For travelers evaluating the PSP to SEA route, the combination of a 86.8% on-time rate, 65.0-minute average delay, 1.4% recent cancellation rate, and 16 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.