Denver to Billings

What the Data Says About DEN to BIL

The Denver to Billings corridor (DEN → BIL) covers roughly 455 miles and is served by 13 carriers, based on Bureau of Transportation Statistics reporting. Across 7,472 flights in the dataset, this route posts a 78.8% on-time rate with an average delay of 69.4 minutes when flights run late. Over the most recent 24 months of BTS data, 3,218 flights were recorded on this pairing — 27 cancelled (0.8%) and 11 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 13 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,472 total flights analyzed, the 78.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 69.4-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, Oct 2025 posted the best performance on this corridor at 91% on-time, while Jul 2025 came in at 62% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the DEN to BIL route, the combination of a 78.8% on-time rate, 69.4-minute average delay, 0.8% recent cancellation rate, and 13 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.