Sacramento (SMF) to Boise (BOI): On-Time Performance
Data through July 2026
When you fly SMF to BOI matters as much as anything else about the booking: the route swung from 92% on-time in August 2024 to just 68% in December 2024. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 75%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.0%
- Flights/day
- 2.4
- last 12 months
- Duration
- 1h 25m
- scheduled
- Distance
- 437 mi
Best airline from SMF to BOI
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 88% | 6 min | 0.0% | 240 |
| Southwest Airlines | 81% | 10 min | 0.0% | 1,694 |
Monthly on-time trend
Best time to fly from SMF to BOI
Aim for departures around 8 a.m. (96% on-time); avoid 3 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 10 min |
| Tuesday | 84% | 8 min |
| Wednesdaybest | 88% | 7 min |
| Thursday | 79% | 12 min |
| Friday | 76% | 13 min |
| Saturday | 84% | 9 min |
| Sunday | 82% | 9 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft69%
- Airline operations24%
- National airspace system7%
- Weather1%
Frequently asked questions
- How often are flights from SMF to BOI delayed?
- 18% of SMF–BOI flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 10 minutes.
- Which airline is most reliable from SMF to BOI?
- SkyWest Airlines has the best on-time record on this route at 88%, based on 240 flights. 2 airlines flew SMF–BOI frequently enough to compare in this period.
- What is the best time of day to fly from SMF to BOI?
- Departures around 8 a.m. have the best record (96% on-time), while departures around 3 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SMF to BOI?
- The scheduled SMF–BOI flight time averages 1h 25m over 437 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are SMF to BOI flights cancelled?
- 0% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SMF to BOI?
- December 2024 was the roughest month in this dataset, with only 68% of arrivals on time. The best was August 2024 at 92%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 1,934 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.