Sun Valley/Hailey/Ketchum (SUN) to Denver (DEN): On-Time Performance
Data through July 2026
The calendar drives reliability on SUN–DEN. September 2024 flights landed on schedule 98% of the time, but May 2025 dropped to 63% — a gap of 36 points. Across the full period the route averages 84% on-time against a national 78%.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 1.7
- last 12 months
- Duration
- 2h 4m
- scheduled
- Distance
- 557 mi
Monthly on-time trend
Best time to fly from SUN to DEN
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 86% | 13 min |
| Tuesday | 82% | 16 min |
| Wednesday | 86% | 18 min |
| Thursday | 81% | 23 min |
| Friday | 83% | 19 min |
| Saturdaybest | 87% | 19 min |
| Sunday | 84% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft18%
- Airline operations39%
- National airspace system24%
- Weather20%
Frequently asked questions
- How often are flights from SUN to DEN delayed?
- 16% of SUN–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 18 minutes.
- How long is the flight from SUN to DEN?
- The scheduled SUN–DEN flight time averages 2h 4m over 557 miles. Actual arrival times vary — flights on this route land 15+ minutes late 16% of the time.
- How often are SUN to DEN flights cancelled?
- 0.5% 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 SUN to DEN?
- May 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2024 at 98%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 1,292 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.