Best Time to Fly PHX to BOI: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.5% of Phoenix (PHX) to Boise (BOI) flights arrived on time (2,015 scheduled flights). That is 2.9 points above the national average of 77.6%.
Among 4 airlines, SkyWest Airlines led with 83.9% on time and American Airlines was last with 69.6%.
Over 24 months, Saturday was the most reliable day (85% on time) and June the worst month (73%).
The cancellation rate was 0.3% (US average 1.8%).
PHX 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 |
|---|---|---|---|---|
| SkyWest Airlines | 83.9% | 71 min | 0.4% | 1,025 |
| Southwest Airlines | 77.5% | 45 min | 0.4% | 813 |
| Envoy Air | 76.5% | 33 min | 0.0% | 116 |
| American Airlines | 69.6% | 60 min | 0.0% | 56 |
| Alaska Airlines | Limited data | 5 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to BOI
On-time arrival % by scheduled departure hour (local time), 4,033 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 88.2% | 0.0% | 68 |
| 8am–9am | 89.4% | 0.0% | 191 |
| 9am–10am | 88.4% | 0.0% | 415 |
| 10am–11am | 85.1% | 0.3% | 645 |
| 11am–12pm | 86.0% | 0.7% | 287 |
| 12pm–1pm | 76.1% | 0.0% | 46 |
| 1pm–2pm | 80.1% | 0.2% | 449 |
| 2pm–3pm | 81.6% | 0.0% | 489 |
| 3pm–4pm | 87.8% | 1.0% | 99 |
| 4pm–5pm | 83.7% | 0.0% | 172 |
| 5pm–6pm | 64.7% | 1.0% | 100 |
| 6pm–7pm | 50.0% | 0.0% | 64 |
| 7pm–8pm | 67.2% | 0.0% | 204 |
| 8pm–9pm | 80.5% | 0.0% | 462 |
| 9pm–10pm | 70.0% | 0.0% | 269 |
| 10pm–11pm | 64.7% | 2.9% | 70 |
| 11pm–12am | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHX 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) | 70.4% | -11.5 pts | 0.0% | 81 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.5% | -5.4 pts | 0.0% | 167 |
| Summer peak (Jun 15 - Aug 15) | 77.8% | -4.1 pts | 0.5% | 657 |
| All other days | 81.9% | — | 0.2% | 3,128 |
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).