Best Time to Fly DEN to SUN: On-Time Stats by Hour & Airline
Denver International → Friedman Memorial
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.3% of Denver (DEN) to Sun Valley/Hailey/Ketchum (SUN) flights arrived on time (630 scheduled flights). That is 3.7 points above the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (84% on time) and June the worst month (68%).
The cancellation rate was 0.0% (US average 1.8%).
DEN to SUN 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 | 81.3% | 71 min | 0.0% | 630 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to SUN
On-time arrival % by scheduled departure hour (local time), 1,230 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 11am–12pm | 88.2% | 0.4% | 727 |
| 7pm–8pm | 72.1% | 0.4% | 501 |
| 8pm–9pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to SUN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 84.8% | +1.6 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 74.8% | -8.4 pts | 0.0% | 247 |
| All other days | 83.2% | — | 0.6% | 909 |
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).