San Francisco to Spokane

What the Data Says About SFO to GEG

The San Francisco to Spokane corridor (SFO → GEG) covers roughly 733 miles and is served by 7 carriers, based on Bureau of Transportation Statistics reporting. Across 4,271 flights in the dataset, this route posts a 84.6% on-time rate with an average delay of 70.3 minutes when flights run late. Over the most recent 24 months of BTS data, 1,488 flights were recorded on this pairing — 11 cancelled (0.7%) and 2 diverted (0.1%). 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 4,271 total flights analyzed, the 84.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 70.3-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, Apr 2025 posted the best performance on this corridor at 90% on-time, while Jul 2025 came in at 68% on-time — a 22-point gap between best and worst recent month. For travelers evaluating the SFO to GEG route, the combination of a 84.6% on-time rate, 70.3-minute average delay, 0.7% recent cancellation rate, and 7 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.