Best Time to Fly SUN to SFO: On-Time Stats by Hour & Airline
Friedman Memorial → San Francisco International
Data through July 2026 · Last updated October 18, 2026
293 flights were scheduled from Sun Valley/Hailey/Ketchum (SUN) to San Francisco (SFO) in the last 12 months, and 62.7% of those that flew arrived on time, 15.0 points below the US 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 (72% on time) and June the worst month (24%).
The cancellation rate was 0.0% (US average 1.8%).
SUN to SFO 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 | 62.7% | 76 min | 0.0% | 293 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SUN to SFO
On-time arrival % by scheduled departure hour (local time), 547 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 28.1% | 0.0% | 33 |
| 8am–9am | 46.7% | 0.4% | 230 |
| 10am–11am | 82.2% | 0.0% | 45 |
| 11am–12pm | Limited data | 5 | |
| 12pm–1pm | Limited data | 4 | |
| 1pm–2pm | 75.0% | 4.0% | 50 |
| 2pm–3pm | 69.7% | 0.0% | 90 |
| 3pm–4pm | 90.6% | 0.0% | 32 |
| 4pm–5pm | 93.1% | 0.0% | 58 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SUN to SFO
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Christmas & New Year (Dec 20 - Jan 3) | 50.0% | -22.8 pts | 0.0% | 56 |
| Summer peak (Jun 15 - Aug 15) | 38.9% | -33.9 pts | 0.0% | 127 |
| All other days | 72.8% | — | 0.8% | 364 |
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).