Williston to Denver

What the Data Says About XWA to DEN

The Williston to Denver corridor (XWA → DEN) covers roughly 582 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 5,784 flights in the dataset, this route posts a 78.4% on-time rate with an average delay of 107.9 minutes when flights run late. Over the most recent 24 months of BTS data, 2,749 flights were recorded on this pairing — 41 cancelled (1.5%) and 25 diverted (0.9%). 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 5,784 total flights analyzed, the 78.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 107.9-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 2024 posted the best performance on this corridor at 94% on-time, while Dec 2025 came in at 61% on-time — a 32-point gap between best and worst recent month. For travelers evaluating the XWA to DEN route, the combination of a 78.4% on-time rate, 107.9-minute average delay, 1.5% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.