Best Time to Fly WYS to DEN: On-Time Stats by Hour & Airline
Yellowstone → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.9% of West Yellowstone (WYS) to Denver (DEN) flights arrived on time (207 scheduled flights). That is 3.8 points below the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (86% on time) and Monday the weakest day of the week (60%).
0.5% of flights were cancelled, versus 1.8% nationally.
WYS to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 73.9% | 109 min | 0.5% | 207 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly WYS to DEN
On-time arrival % by scheduled departure hour (local time), 326 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 10am–11am | 78.1% | 0.0% | 32 |
| 11am–12pm | Limited data | 2 | |
| 1pm–2pm | 75.7% | 0.9% | 109 |
| 2pm–3pm | 68.8% | 0.7% | 150 |
| 5pm–6pm | 69.7% | 0.0% | 33 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on WYS to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 65.9% | -11.2 pts | 0.0% | 141 |
| All other days | 77.1% | — | 1.1% | 185 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).