San Francisco (SFO) to Sun Valley/Hailey/Ketchum (SUN): On-Time Performance
Data through July 2026
San Francisco (SFO) to Sun Valley/Hailey/Ketchum (SUN) is a thinner route than most in this dataset — 293 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 84% arrived on time, comfortably above the national average of 78%.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 0.80
- last 12 months
- Duration
- 1h 57m
- scheduled
- Distance
- 587 mi
Monthly on-time trend
Best time to fly from SFO to SUN
Aim for departures around 10 a.m. (87% on-time); avoid 8 a.m. departures (82%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 7 min |
| Tuesday | 90% | 11 min |
| Wednesday | 85% | 7 min |
| Thursday | 80% | 15 min |
| Friday | 78% | 13 min |
| Saturdaybest | 90% | 11 min |
| Sunday | 81% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations43%
- National airspace system17%
- Weather7%
Frequently asked questions
- How often are flights from SFO to SUN delayed?
- 16% of SFO–SUN 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 11 minutes.
- What is the best time of day to fly from SFO to SUN?
- Departures around 10 a.m. have the best record (87% on-time), while departures around 8 a.m. have the worst (82%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFO to SUN?
- The scheduled SFO–SUN flight time averages 1h 57m over 587 miles. Actual arrival times vary — flights on this route land 15+ minutes late 16% of the time.
- How often are SFO to SUN 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 SFO to SUN?
- December 2025 was the roughest month in this dataset, with only 66% of arrivals on time. The best was March 2026 at 97%. If your dates are flexible, that 32-point gap is worth planning around.
Explore related pages
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Related guides
Based on 578 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.