San Francisco (SFO) to Boise (BOI): On-Time Performance
Data through July 2026
When you fly SFO to BOI matters as much as anything else about the booking: the route swung from 91% on-time in January 2025 to just 61% in June 2026. Across the full period the route averages 79% on-time against a national 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 4.7
- last 12 months
- Duration
- 1h 47m
- scheduled
- Distance
- 522 mi
Best airline from SFO to BOI
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 79% | 15 min | 0.5% | 2,830 |
| United Airlines | 79% | 14 min | 0.5% | 603 |
Monthly on-time trend
Best time to fly from SFO to BOI
Aim for departures around 9 p.m. (91% on-time); avoid 12 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 21 min |
| Tuesdaybest | 84% | 11 min |
| Wednesday | 82% | 11 min |
| Thursday | 74% | 18 min |
| Friday | 77% | 19 min |
| Saturday | 83% | 12 min |
| Sunday | 79% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations28%
- National airspace system24%
- Weather3%
Frequently asked questions
- How often are flights from SFO to BOI delayed?
- 21% of SFO–BOI 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 15 minutes.
- Which airline is most reliable from SFO to BOI?
- SkyWest Airlines has the best on-time record on this route at 79%, based on 2,830 flights. 2 airlines flew SFO–BOI frequently enough to compare in this period.
- What is the best time of day to fly from SFO to BOI?
- Departures around 9 p.m. have the best record (91% on-time), while departures around 12 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFO to BOI?
- The scheduled SFO–BOI flight time averages 1h 47m over 522 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are SFO to BOI 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 BOI?
- June 2026 was the roughest month in this dataset, with only 61% of arrivals on time. The best was January 2025 at 91%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 3,433 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.