Best Time to Fly BOI to SMF: On-Time Stats by Hour & Airline
Boise Air Terminal → Sacramento International
Data through July 2026 · Last updated October 18, 2026
860 flights were scheduled from Boise (BOI) to Sacramento (SMF) in the last 12 months, and 85.0% of those that flew arrived on time, 7.3 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
January has been the best month (89% on time) and Friday the weakest day of the week (81%).
0.1% of flights were cancelled, versus 1.8% nationally.
BOI to SMF 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 |
|---|---|---|---|---|
| Southwest Airlines | 85.0% | 56 min | 0.1% | 860 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOI to SMF
On-time arrival % by scheduled departure hour (local time), 1,841 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 97.7% | 0.0% | 256 |
| 7am–8am | 97.4% | 0.0% | 230 |
| 9am–10am | Limited data | 2 | |
| 10am–11am | Limited data | 26 | |
| 11am–12pm | 91.7% | 0.0% | 133 |
| 12pm–1pm | 90.8% | 0.0% | 152 |
| 1pm–2pm | 89.8% | 0.0% | 225 |
| 2pm–3pm | 97.0% | 0.0% | 33 |
| 3pm–4pm | Limited data | 19 | |
| 4pm–5pm | 77.5% | 0.0% | 49 |
| 5pm–6pm | 88.3% | 0.6% | 180 |
| 6pm–7pm | 73.7% | 0.0% | 175 |
| 7pm–8pm | 67.5% | 0.0% | 198 |
| 8pm–9pm | 73.6% | 0.0% | 87 |
| 9pm–10pm | 57.9% | 0.0% | 76 |
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 SMF
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) | 85.4% | -1.2 pts | 0.0% | 41 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.0% | -12.6 pts | 0.0% | 73 |
| Summer peak (Jun 15 - Aug 15) | 83.4% | -3.2 pts | 0.0% | 344 |
| All other days | 86.6% | — | 0.1% | 1,383 |
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).