Best Time to Fly SFO to BOI: On-Time Stats by Hour & Airline
San Francisco International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
1,713 flights were scheduled from San Francisco (SFO) to Boise (BOI) in the last 12 months, and 75.8% of those that flew arrived on time, 1.8 points below the US average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 77.6%, while SkyWest Airlines trailed at 75.6%.
March has been the best month (88% on time) and Monday the weakest day of the week (73%).
0.3% of flights were cancelled, versus 1.8% nationally.
SFO 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 |
|---|---|---|---|---|
| United Airlines | 77.6% | 52 min | 0.4% | 230 |
| SkyWest Airlines | 75.6% | 73 min | 0.3% | 1,483 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SFO to BOI
On-time arrival % by scheduled departure hour (local time), 3,317 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 89.2% | 0.0% | 444 |
| 9am–10am | Limited data | 1 | |
| 10am–11am | 63.4% | 0.0% | 112 |
| 11am–12pm | 84.9% | 0.7% | 147 |
| 12pm–1pm | 57.1% | 2.0% | 50 |
| 1pm–2pm | 76.1% | 0.5% | 615 |
| 2pm–3pm | 83.5% | 0.0% | 109 |
| 4pm–5pm | 79.9% | 0.9% | 573 |
| 5pm–6pm | 79.0% | 0.0% | 81 |
| 6pm–7pm | 78.0% | 0.9% | 524 |
| 7pm–8pm | 80.2% | 0.0% | 340 |
| 8pm–9pm | 63.6% | 0.0% | 243 |
| 9pm–10pm | 90.9% | 0.0% | 77 |
| 10pm–11pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SFO 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) | 84.8% | +4.3 pts | 0.0% | 66 |
| Christmas & New Year (Dec 20 - Jan 3) | 61.1% | -19.5 pts | 1.4% | 146 |
| Summer peak (Jun 15 - Aug 15) | 73.4% | -7.2 pts | 0.0% | 527 |
| All other days | 80.6% | — | 0.5% | 2,578 |
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).