Best Time to Fly BOI to PHX: On-Time Stats by Hour & Airline
Boise Air Terminal → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.6% of Boise (BOI) to Phoenix (PHX) flights arrived on time (2,014 scheduled flights). That is 6.0 points above the national average of 77.6%.
SkyWest Airlines was the most punctual of the 4 airlines on the route at 86.2%, while American Airlines trailed at 73.2%.
December has been the best month (88% on time) and Friday the weakest day of the week (80%).
0.4% of flights were cancelled, versus 1.8% nationally.
BOI to PHX 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 | 86.2% | 94 min | 0.4% | 1,024 |
| Southwest Airlines | 82.4% | 60 min | 0.5% | 813 |
| Envoy Air | 75.9% | 45 min | 0.0% | 116 |
| American Airlines | 73.2% | 99 min | 0.0% | 56 |
| Alaska Airlines | Limited data | 5 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOI to PHX
On-time arrival % by scheduled departure hour (local time), 4,031 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 98.6% | 0.3% | 290 |
| 6am–7am | 93.9% | 0.0% | 817 |
| 7am–8am | 92.9% | 0.6% | 183 |
| 8am–9am | 92.9% | 0.0% | 240 |
| 9am–10am | 80.3% | 0.0% | 76 |
| 10am–11am | Limited data | 10 | |
| 11am–12pm | 80.4% | 0.0% | 46 |
| 12pm–1pm | 83.7% | 0.4% | 252 |
| 1pm–2pm | 80.5% | 0.4% | 464 |
| 2pm–3pm | 85.0% | 0.9% | 349 |
| 3pm–4pm | 86.0% | 0.0% | 207 |
| 4pm–5pm | 72.5% | 0.9% | 226 |
| 5pm–6pm | 68.6% | 0.1% | 666 |
| 6pm–7pm | 79.9% | 0.0% | 154 |
| 7pm–8pm | 47.1% | 0.0% | 51 |
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 PHX
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) | 90.1% | +5.8 pts | 0.0% | 81 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.0% | -2.3 pts | 0.0% | 167 |
| Summer peak (Jun 15 - Aug 15) | 81.3% | -3.1 pts | 0.5% | 656 |
| All other days | 84.4% | — | 0.3% | 3,127 |
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).