Best Time to Fly PDX to BOI: On-Time Stats by Hour & Airline
Portland International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
908 flights were scheduled from Portland (PDX) to Boise (BOI) in the last 12 months, and 86.3% of those that flew arrived on time, 8.7 points above the US average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 89.2% on time and Alaska Airlines was last with 85.5%.
Over 24 months, Tuesday was the most reliable day (89% on time) and December the worst month (81%).
The cancellation rate was 0.8% (US average 1.8%).
PDX 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 | 89.2% | 67 min | 2.3% | 218 |
| Alaska Airlines | 85.5% | 45 min | 0.3% | 690 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to BOI
On-time arrival % by scheduled departure hour (local time), 2,033 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 82.1% | 0.0% | 56 |
| 10am–11am | 88.4% | 1.1% | 471 |
| 12pm–1pm | 89.7% | 0.0% | 174 |
| 1pm–2pm | Limited data | 1 | |
| 2pm–3pm | 83.8% | 0.2% | 600 |
| 3pm–4pm | Limited data | 10 | |
| 4pm–5pm | Limited data | 15 | |
| 5pm–6pm | 83.7% | 0.0% | 86 |
| 6pm–7pm | Limited data | 20 | |
| 7pm–8pm | 80.9% | 0.0% | 110 |
| 8pm–9pm | Limited data | 27 | |
| 9pm–10pm | 82.8% | 0.7% | 463 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PDX 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) | 68.8% | -17.4 pts | 0.0% | 32 |
| Christmas & New Year (Dec 20 - Jan 3) | 70.0% | -16.2 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 82.6% | -3.6 pts | 0.0% | 247 |
| All other days | 86.2% | — | 0.6% | 1,694 |
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).