Denver to Salt Lake City

What the Data Says About DEN to SLC

The Denver to Salt Lake City corridor (DEN → SLC) covers roughly 391 miles and is served by 21 carriers, based on Bureau of Transportation Statistics reporting. Across 43,089 flights in the dataset, this route posts a 78.3% on-time rate with an average delay of 67.1 minutes when flights run late. Over the most recent 24 months of BTS data, 15,860 flights were recorded on this pairing — 98 cancelled (0.6%) and 12 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 21 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 43,089 total flights analyzed, the 78.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 67.1-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, Sep 2024 posted the best performance on this corridor at 86% on-time, while Jul 2025 came in at 60% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the DEN to SLC route, the combination of a 78.3% on-time rate, 67.1-minute average delay, 0.6% recent cancellation rate, and 21 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.