Best Time to Fly SAN to BOI: On-Time Stats by Hour & Airline
San Diego International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
1,031 flights were scheduled from San Diego (SAN) to Boise (BOI) in the last 12 months, and 79.3% of those that flew arrived on time, 1.6 points above the US average of 77.6%.
Among 3 airlines, SkyWest Airlines led with 85.6% on time and Southwest Airlines was last with 72.1%.
Over 24 months, Saturday was the most reliable day (87% on time) and December the worst month (71%).
The cancellation rate was 0.4% (US average 1.8%).
SAN 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 | 85.6% | 70 min | 0.3% | 375 |
| Alaska Airlines | 80.9% | 45 min | 1.1% | 265 |
| Southwest Airlines | 72.1% | 53 min | 0.0% | 391 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to BOI
On-time arrival % by scheduled departure hour (local time), 1,843 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 83.9% | 0.0% | 56 |
| 8am–9am | 81.9% | 1.2% | 335 |
| 9am–10am | 77.0% | 0.5% | 184 |
| 10am–11am | 82.0% | 1.2% | 163 |
| 11am–12pm | Limited data | 27 | |
| 12pm–1pm | 56.7% | 0.0% | 134 |
| 1pm–2pm | 87.0% | 0.0% | 92 |
| 2pm–3pm | 78.8% | 0.0% | 80 |
| 3pm–4pm | 74.2% | 0.0% | 62 |
| 4pm–5pm | Limited data | 10 | |
| 5pm–6pm | 73.0% | 0.9% | 112 |
| 6pm–7pm | 65.8% | 0.0% | 114 |
| 7pm–8pm | 75.0% | 1.3% | 150 |
| 8pm–9pm | 80.1% | 1.0% | 290 |
| 9pm–10pm | 67.7% | 0.0% | 34 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAN 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) | 79.5% | +1.3 pts | 0.0% | 39 |
| Christmas & New Year (Dec 20 - Jan 3) | 60.2% | -17.9 pts | 5.7% | 88 |
| Summer peak (Jun 15 - Aug 15) | 74.6% | -3.5 pts | 0.3% | 336 |
| All other days | 78.2% | — | 0.5% | 1,380 |
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).