Williston (XWA) to Denver (DEN): On-Time Performance
Data through July 2026
Williston (XWA) to Denver (DEN) effectively runs on two schedules. In October 2024, 93% of arrivals were on time; in December 2025 that fell to 60% — a 33-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 62%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 26 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 3.8
- last 12 months
- Duration
- 2h 7m
- scheduled
- Distance
- 582 mi
Monthly on-time trend
Best time to fly from XWA to DEN
Aim for departures around 7 a.m. (85% on-time); avoid 5 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 28 min |
| Tuesday | 74% | 26 min |
| Wednesday | 74% | 25 min |
| Thursday | 74% | 27 min |
| Friday | 75% | 22 min |
| Saturdaybest | 79% | 24 min |
| Sunday | 76% | 33 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft21%
- Airline operations42%
- National airspace system24%
- Weather13%
- Security1%
Frequently asked questions
- How often are flights from XWA to DEN delayed?
- 25% of XWA–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 26 minutes.
- What is the best time of day to fly from XWA to DEN?
- Departures around 7 a.m. have the best record (85% on-time), while departures around 5 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from XWA to DEN?
- The scheduled XWA–DEN flight time averages 2h 7m over 582 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are XWA to DEN flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from XWA to DEN?
- December 2025 was the roughest month in this dataset, with only 60% of arrivals on time. The best was October 2024 at 93%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 2,914 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.