San Francisco to Aspen

What the Data Says About SFO to ASE

The San Francisco to Aspen corridor (SFO → ASE) covers roughly 848 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 1,523 flights in the dataset, this route posts a 72.9% on-time rate with an average delay of 109.1 minutes when flights run late. Over the most recent 24 months of BTS data, 1,136 flights were recorded on this pairing — 60 cancelled (5.3%) and 46 diverted (4.0%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 1,523 total flights analyzed, the 72.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 109.1-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, Feb 2022 posted the best performance on this corridor at 82% on-time, while Feb 2024 came in at 62% on-time — a 20-point gap between best and worst recent month. For travelers evaluating the SFO to ASE route, the combination of a 72.9% on-time rate, 109.1-minute average delay, 5.3% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.