Best Time to Fly BOI to PDX: On-Time Stats by Hour & Airline
Boise Air Terminal → Portland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 91.4% of Boise (BOI) to Portland (PDX) flights arrived on time (1,084 scheduled flights). That is 13.7 points above the national average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 91.5%, while Alaska Airlines trailed at 91.3%.
April has been the best month (95% on time) and Friday the weakest day of the week (85%).
0.6% of flights were cancelled, versus 1.8% nationally.
BOI to PDX 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 | 91.5% | 64 min | 1.3% | 395 |
| Alaska Airlines | 91.3% | 58 min | 0.1% | 689 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOI to PDX
On-time arrival % by scheduled departure hour (local time), 2,287 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.6% | 0.0% | 277 |
| 6am–7am | 100.0% | 0.8% | 124 |
| 7am–8am | 93.4% | 1.3% | 229 |
| 9am–10am | 94.5% | 0.0% | 289 |
| 10am–11am | 84.2% | 0.0% | 57 |
| 12pm–1pm | 77.5% | 0.0% | 98 |
| 1pm–2pm | 88.0% | 1.6% | 305 |
| 2pm–3pm | 88.8% | 0.0% | 98 |
| 3pm–4pm | 90.4% | 0.0% | 104 |
| 4pm–5pm | 85.4% | 0.0% | 417 |
| 5pm–6pm | 80.9% | 1.0% | 201 |
| 7pm–8pm | 89.5% | 0.0% | 67 |
| 8pm–9pm | Limited data | 21 | |
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 PDX
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) | 76.9% | -13.4 pts | 0.0% | 39 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.7% | -7.7 pts | 0.0% | 75 |
| Summer peak (Jun 15 - Aug 15) | 87.4% | -3.0 pts | 0.0% | 309 |
| All other days | 90.3% | — | 0.6% | 1,864 |
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).