Billings to Denver

What the Data Says About BIL to DEN

The Billings to Denver corridor (BIL → DEN) covers roughly 455 miles and is served by 12 carriers, based on Bureau of Transportation Statistics reporting. Across 7,478 flights in the dataset, this route posts a 81.6% on-time rate with an average delay of 79.5 minutes when flights run late. Over the most recent 24 months of BTS data, 3,218 flights were recorded on this pairing — 33 cancelled (1.0%) and 13 diverted (0.4%). Those baseline metrics tell you what to expect before you book.

Having 12 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,478 total flights analyzed, the 81.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 79.5-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, Dec 2024 posted the best performance on this corridor at 95% on-time, while Feb 2025 came in at 64% on-time — a 31-point gap between best and worst recent month. For travelers evaluating the BIL to DEN route, the combination of a 81.6% on-time rate, 79.5-minute average delay, 1.0% recent cancellation rate, and 12 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.