Phoenix (PHX) to Boise (BOI): On-Time Performance
Data through July 2026
The calendar drives reliability on PHX–BOI. January 2025 flights landed on schedule 87% of the time, but June 2026 dropped to 70% — a gap of 17 points. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 71%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.2%
- Flights/day
- 5.5
- last 12 months
- Duration
- 2h 13m
- scheduled
- Distance
- 735 mi
Best airline from PHX to BOI
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 82% | 12 min | 0.3% | 2,140 |
| Envoy Air | 82% | 7 min | 0.0% | 199 |
| American Airlines | 79% | 14 min | 0.0% | 143 |
| Southwest Airlines | 78% | 11 min | 0.2% | 1,664 |
Monthly on-time trend
Best time to fly from PHX to BOI
Aim for departures around 7 a.m. (88% on-time); avoid 6 p.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 14 min |
| Tuesday | 83% | 10 min |
| Wednesday | 81% | 10 min |
| Thursday | 79% | 12 min |
| Friday | 78% | 15 min |
| Saturdaybest | 85% | 8 min |
| Sunday | 79% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations45%
- National airspace system9%
- Weather7%
Frequently asked questions
- How often are flights from PHX to BOI delayed?
- 20% of PHX–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 12 minutes.
- Which airline is most reliable from PHX to BOI?
- SkyWest Airlines has the best on-time record on this route at 82%, based on 2,140 flights. 4 airlines flew PHX–BOI frequently enough to compare in this period.
- What is the best time of day to fly from PHX to BOI?
- Departures around 7 a.m. have the best record (88% on-time), while departures around 6 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHX to BOI?
- The scheduled PHX–BOI flight time averages 2h 13m over 735 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are PHX to BOI flights cancelled?
- 0.2% 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 PHX to BOI?
- June 2026 was the roughest month in this dataset, with only 70% of arrivals on time. The best was January 2025 at 87%. If your dates are flexible, that 17-point gap is worth planning around.
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Based on 4,152 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.