Boise (BOI) to San Francisco (SFO): On-Time Performance
Data through July 2026
The calendar drives reliability on BOI–SFO. January 2025 flights landed on schedule 91% of the time, but June 2026 dropped to 40% — a gap of 51 points. Across the full period the route averages 73% on-time against a national 78%.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 4.7
- last 12 months
- Duration
- 1h 60m
- scheduled
- Distance
- 522 mi
Best airline from BOI to SFO
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 75% | 25 min | 0.7% | 602 |
| SkyWest Airlines | 73% | 19 min | 0.5% | 2,835 |
Monthly on-time trend
Best time to fly from BOI to SFO
Aim for departures around 6 a.m. (93% on-time); avoid 4 p.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 18 min |
| Tuesday | 81% | 15 min |
| Wednesday | 70% | 21 min |
| Thursday | 68% | 29 min |
| Friday | 72% | 21 min |
| Saturdaybest | 82% | 16 min |
| Sunday | 72% | 22 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft17%
- Airline operations33%
- National airspace system47%
- Weather3%
Frequently asked questions
- How often are flights from BOI to SFO delayed?
- 27% of BOI–SFO 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 20 minutes.
- Which airline is most reliable from BOI to SFO?
- United Airlines has the best on-time record on this route at 75%, based on 602 flights. 2 airlines flew BOI–SFO frequently enough to compare in this period.
- What is the best time of day to fly from BOI to SFO?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 4 p.m. have the worst (53%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOI to SFO?
- The scheduled BOI–SFO flight time averages 1h 60m over 522 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are BOI to SFO 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 BOI to SFO?
- June 2026 was the roughest month in this dataset, with only 40% of arrivals on time. The best was January 2025 at 91%. If your dates are flexible, that 51-point gap is worth planning around.
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Based on 3,437 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.