Best Time to Fly SJC to BOI: On-Time Stats by Hour & Airline
Norman Y. Mineta San Jose International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
676 flights were scheduled from San Jose (SJC) to Boise (BOI) in the last 12 months, and 83.2% of those that flew arrived on time, 5.6 points above the US average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 86.6% on time and Southwest Airlines was last with 79.6%.
Over 24 months, Tuesday was the most reliable day (95% on time) and June the worst month (74%).
The cancellation rate was 0.3% (US average 1.8%).
SJC to BOI 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 | 86.6% | 54 min | 0.6% | 346 |
| Southwest Airlines | 79.6% | 49 min | 0.0% | 330 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJC to BOI
On-time arrival % by scheduled departure hour (local time), 1,352 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | Limited data | 25 | |
| 9am–10am | 95.9% | 0.0% | 123 |
| 10am–11am | 83.0% | 0.0% | 47 |
| 11am–12pm | 92.1% | 0.0% | 189 |
| 12pm–1pm | 89.4% | 0.0% | 142 |
| 1pm–2pm | 84.9% | 0.0% | 53 |
| 3pm–4pm | 62.6% | 1.2% | 84 |
| 4pm–5pm | 67.5% | 0.0% | 151 |
| 5pm–6pm | 90.2% | 0.0% | 133 |
| 6pm–7pm | 81.5% | 0.0% | 168 |
| 7pm–8pm | 87.2% | 0.8% | 237 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJC to BOI
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) | 76.8% | -9.4 pts | 1.4% | 70 |
| Summer peak (Jun 15 - Aug 15) | 81.5% | -4.7 pts | 0.4% | 250 |
| All other days | 86.2% | — | 0.1% | 1,003 |
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).