Best Time to Fly SJC to PDX: On-Time Stats by Hour & Airline
Norman Y. Mineta San Jose International → Portland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 85.8% of San Jose (SJC) to Portland (PDX) flights arrived on time (1,653 scheduled flights). That is 8.1 points above the national average of 77.6%.
Alaska Airlines was the most punctual of the 3 airlines on the route at 95.1%, while Southwest Airlines trailed at 80.3%.
January has been the best month (90% on time) and Friday the weakest day of the week (80%).
0.0% of flights were cancelled, versus 1.8% nationally.
SJC 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 |
|---|---|---|---|---|
| Alaska Airlines | 95.1% | 81 min | 0.0% | 226 |
| SkyWest Airlines | 92.1% | 60 min | 0.0% | 480 |
| Southwest Airlines | 80.3% | 48 min | 0.0% | 947 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJC to PDX
On-time arrival % by scheduled departure hour (local time), 3,752 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 96.5% | 0.0% | 288 |
| 7am–8am | 97.6% | 0.0% | 246 |
| 8am–9am | 96.1% | 0.0% | 256 |
| 9am–10am | 92.8% | 0.0% | 153 |
| 10am–11am | 93.6% | 0.0% | 187 |
| 11am–12pm | 91.1% | 0.2% | 583 |
| 12pm–1pm | 95.3% | 0.0% | 193 |
| 1pm–2pm | 87.0% | 0.0% | 169 |
| 2pm–3pm | 86.1% | 0.0% | 194 |
| 3pm–4pm | 72.6% | 0.5% | 191 |
| 4pm–5pm | 70.0% | 0.5% | 184 |
| 5pm–6pm | 82.7% | 0.5% | 186 |
| 6pm–7pm | 78.0% | 0.0% | 295 |
| 7pm–8pm | 74.5% | 0.0% | 145 |
| 8pm–9pm | 81.7% | 0.4% | 258 |
| 9pm–10pm | 64.1% | 0.0% | 223 |
| 10pm–11pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJC 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) | 86.2% | -0.8 pts | 0.0% | 65 |
| Christmas & New Year (Dec 20 - Jan 3) | 79.5% | -7.5 pts | 0.0% | 156 |
| Summer peak (Jun 15 - Aug 15) | 82.9% | -4.1 pts | 0.0% | 642 |
| All other days | 87.0% | — | 0.2% | 2,889 |
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).