Billings (BIL) to Denver (DEN): On-Time Performance
Data through July 2026
Billings (BIL) to Denver (DEN) effectively runs on two schedules. In December 2024, 95% of arrivals were on time; in February 2025 that fell to 64% — a 31-point seasonal swing. Across the full period the route averages 80% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 70%), which matters most in the rough months.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 4.9
- last 12 months
- Duration
- 1h 47m
- scheduled
- Distance
- 455 mi
Best airline from BIL to DEN
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 80% | 18 min | 1.3% | 2,117 |
| United Airlines | 80% | 15 min | 0.3% | 1,520 |
Monthly on-time trend
Best time to fly from BIL to DEN
Aim for departures around 5 a.m. (93% on-time); avoid 4 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 15 min |
| Tuesday | 81% | 18 min |
| Wednesdaybest | 82% | 14 min |
| Thursday | 78% | 17 min |
| Friday | 78% | 17 min |
| Saturday | 82% | 19 min |
| Sunday | 80% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft29%
- Airline operations28%
- National airspace system36%
- Weather8%
Frequently asked questions
- How often are flights from BIL to DEN delayed?
- 20% of BIL–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 17 minutes.
- Which airline is most reliable from BIL to DEN?
- SkyWest Airlines has the best on-time record on this route at 80%, based on 2,117 flights. 2 airlines flew BIL–DEN frequently enough to compare in this period.
- What is the best time of day to fly from BIL to DEN?
- Departures around 5 a.m. have the best record (93% on-time), while departures around 4 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BIL to DEN?
- The scheduled BIL–DEN flight time averages 1h 47m over 455 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are BIL to DEN flights cancelled?
- 0.9% 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 BIL to DEN?
- February 2025 was the roughest month in this dataset, with only 64% of arrivals on time. The best was December 2024 at 95%. If your dates are flexible, that 31-point gap is worth planning around.
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Based on 3,637 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.