Denver to Sun Valley/Hailey/Ketchum

What the Data Says About DEN to SUN

The Denver to Sun Valley/Hailey/Ketchum corridor (DEN → SUN) covers roughly 557 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 2,224 flights in the dataset, this route posts a 83.1% on-time rate with an average delay of 77.7 minutes when flights run late. Over the most recent 24 months of BTS data, 1,237 flights were recorded on this pairing — 10 cancelled (0.8%) and 13 diverted (1.1%). 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 2,224 total flights analyzed, the 83.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 77.7-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 2024 posted the best performance on this corridor at 96% on-time, while Jun 2025 came in at 67% on-time — a 30-point gap between best and worst recent month. For travelers evaluating the DEN to SUN route, the combination of a 83.1% on-time rate, 77.7-minute average delay, 0.8% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.