Best Time to Fly BOI to SJC: On-Time Stats by Hour & Airline
Boise Air Terminal → Norman Y. Mineta San Jose International
Data through July 2026 · Last updated October 18, 2026
658 flights were scheduled from Boise (BOI) to San Jose (SJC) in the last 12 months, and 85.8% of those that flew arrived on time, 8.2 points above the US average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 93.3%, while Southwest Airlines trailed at 78.5%.
January has been the best month (93% on time) and Friday the weakest day of the week (81%).
0.1% of flights were cancelled, versus 1.8% nationally.
BOI to SJC 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 | 93.3% | 68 min | 0.3% | 328 |
| Southwest Airlines | 78.5% | 50 min | 0.0% | 330 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOI to SJC
On-time arrival % by scheduled departure hour (local time), 1,333 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 90.2% | 1.2% | 83 |
| 8am–9am | 95.8% | 0.0% | 168 |
| 9am–10am | 91.7% | 0.0% | 108 |
| 10am–11am | 93.7% | 0.0% | 255 |
| 11am–12pm | 82.0% | 0.0% | 39 |
| 12pm–1pm | 90.1% | 0.0% | 162 |
| 1pm–2pm | 85.2% | 0.0% | 115 |
| 2pm–3pm | 88.6% | 0.0% | 79 |
| 3pm–4pm | 83.8% | 0.8% | 118 |
| 4pm–5pm | 66.1% | 0.0% | 112 |
| 5pm–6pm | 72.7% | 0.0% | 55 |
| 6pm–7pm | Limited data | 20 | |
| 7pm–8pm | Limited data | 10 | |
| 8pm–9pm | Limited data | 9 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOI to SJC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 29 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 68.6% | -21.2 pts | 0.0% | 70 |
| Summer peak (Jun 15 - Aug 15) | 81.9% | -7.8 pts | 0.0% | 249 |
| All other days | 89.7% | — | 0.2% | 985 |
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).