Best Time to Fly SMF to BOI: On-Time Stats by Hour & Airline
Sacramento International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
860 flights were scheduled from Sacramento (SMF) to Boise (BOI) in the last 12 months, and 80.7% of those that flew arrived on time, 3.1 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
August has been the best month (88% on time) and Friday the weakest day of the week (76%).
0.0% of flights were cancelled, versus 1.8% nationally.
SMF 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 |
|---|---|---|---|---|
| Southwest Airlines | 80.7% | 47 min | 0.0% | 860 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SMF to BOI
On-time arrival % by scheduled departure hour (local time), 1,842 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 26 | |
| 6am–7am | Limited data | 15 | |
| 7am–8am | 92.6% | 0.0% | 176 |
| 8am–9am | 96.4% | 0.0% | 138 |
| 9am–10am | 96.0% | 0.0% | 100 |
| 10am–11am | 90.8% | 0.0% | 174 |
| 11am–12pm | 88.2% | 0.0% | 136 |
| 12pm–1pm | 85.0% | 0.0% | 40 |
| 1pm–2pm | 67.1% | 0.0% | 70 |
| 2pm–3pm | 83.7% | 0.0% | 129 |
| 3pm–4pm | 68.5% | 0.0% | 185 |
| 4pm–5pm | 72.6% | 0.0% | 146 |
| 5pm–6pm | Limited data | 2 | |
| 6pm–7pm | 67.8% | 0.0% | 59 |
| 7pm–8pm | 80.6% | 0.0% | 160 |
| 8pm–9pm | 74.5% | 0.0% | 184 |
| 9pm–10pm | 71.6% | 0.0% | 102 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SMF 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) | 73.2% | -11.0 pts | 0.0% | 41 |
| Christmas & New Year (Dec 20 - Jan 3) | 61.6% | -22.5 pts | 0.0% | 73 |
| Summer peak (Jun 15 - Aug 15) | 79.7% | -4.5 pts | 0.0% | 344 |
| All other days | 84.2% | — | 0.0% | 1,384 |
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).