Portland (PDX) to Boise (BOI): On-Time Performance
Data through July 2026
When you fly PDX to BOI matters as much as anything else about the booking: the route swung from 94% on-time in April 2025 to just 76% in August 2024. Across the full period the route averages 85% on-time against a national 78%.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 8 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 2.5
- last 12 months
- Duration
- 1h 15m
- scheduled
- Distance
- 344 mi
Best airline from PDX to BOI
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 85% | 9 min | 0.6% | 1,332 |
| Alaska Airlines | 85% | 8 min | 0.3% | 789 |
Monthly on-time trend
Best time to fly from PDX to BOI
Aim for departures around 12 p.m. (90% on-time); avoid 7 p.m. departures (82%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 86% | 9 min |
| Tuesdaybest | 89% | 5 min |
| Wednesday | 88% | 6 min |
| Thursday | 84% | 8 min |
| Friday | 80% | 11 min |
| Saturday | 87% | 9 min |
| Sunday | 83% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft55%
- Airline operations28%
- National airspace system15%
- Weather3%
Frequently asked questions
- How often are flights from PDX to BOI delayed?
- 15% of PDX–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 8 minutes.
- Which airline is most reliable from PDX to BOI?
- SkyWest Airlines has the best on-time record on this route at 85%, based on 1,332 flights. 2 airlines flew PDX–BOI frequently enough to compare in this period.
- What is the best time of day to fly from PDX to BOI?
- Departures around 12 p.m. have the best record (90% on-time), while departures around 7 p.m. have the worst (82%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PDX to BOI?
- The scheduled PDX–BOI flight time averages 1h 15m over 344 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are PDX to BOI flights cancelled?
- 0.5% 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 PDX to BOI?
- August 2024 was the roughest month in this dataset, with only 76% of arrivals on time. The best was April 2025 at 94%. If your dates are flexible, that 18-point gap is worth planning around.
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Based on 2,121 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.