Best Time to Fly BOI to SFO: On-Time Stats by Hour & Airline
Boise Air Terminal → San Francisco International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.5% of Boise (BOI) to San Francisco (SFO) flights arrived on time (1,716 scheduled flights). That is 9.1 points below the national average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 68.8%, while United Airlines trailed at 66.7%.
January has been the best month (86% on time) and Thursday the weakest day of the week (68%).
0.5% of flights were cancelled, versus 1.8% nationally.
BOI to SFO 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 | 68.8% | 75 min | 0.4% | 1,485 |
| United Airlines | 66.7% | 107 min | 0.9% | 231 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOI to SFO
On-time arrival % by scheduled departure hour (local time), 3,321 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 93.1% | 0.5% | 380 |
| 7am–8am | 84.1% | 0.0% | 365 |
| 8am–9am | 59.2% | 1.3% | 313 |
| 9am–10am | 59.9% | 0.0% | 240 |
| 10am–11am | 61.5% | 0.2% | 449 |
| 11am–12pm | 83.8% | 0.0% | 105 |
| 12pm–1pm | 75.8% | 0.4% | 261 |
| 1pm–2pm | 79.1% | 0.0% | 86 |
| 2pm–3pm | 78.5% | 0.6% | 351 |
| 3pm–4pm | Limited data | 23 | |
| 4pm–5pm | 52.6% | 2.6% | 39 |
| 6pm–7pm | 70.8% | 1.1% | 180 |
| 7pm–8pm | 70.5% | 0.6% | 529 |
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 SFO
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) | 83.6% | +8.0 pts | 0.0% | 67 |
| Christmas & New Year (Dec 20 - Jan 3) | 65.7% | -9.9 pts | 2.0% | 146 |
| Summer peak (Jun 15 - Aug 15) | 62.8% | -12.8 pts | 0.2% | 527 |
| All other days | 75.6% | — | 0.5% | 2,581 |
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).