Portland (PDX) to San Jose (SJC): On-Time Performance
Data through May 2026
Portland (PDX) to San Jose (SJC) effectively runs on two schedules. In December 2024, 90% of arrivals were on time; in June 2025 that fell to 72% — a 18-point seasonal swing. Across the full period the route averages 84% on-time against a national 78%. Morning departures also hold up better than evening ones (94% vs 71%), which matters most in the rough months.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 4.4
- last 12 months
- Duration
- 1h 49m
- scheduled
- Distance
- 569 mi
Best airline from PDX to SJC
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 94% | 6 min | 0.0% | 169 |
| SkyWest Airlines | 87% | 7 min | 0.1% | 1,290 |
| Spirit Airlines | 86% | 13 min | 0.9% | 114 |
| Southwest Airlines | 82% | 11 min | 0.4% | 2,273 |
Monthly on-time trend
Best time to fly from PDX to SJC
Aim for departures around 5 a.m. (98% on-time); avoid 8 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 9 min |
| Tuesday | 84% | 10 min |
| Wednesday | 88% | 7 min |
| Thursday | 82% | 12 min |
| Friday | 79% | 11 min |
| Saturdaybest | 91% | 5 min |
| Sunday | 82% | 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 aircraft62%
- Airline operations31%
- National airspace system5%
- Weather2%
Frequently asked questions
- How often are flights from PDX to SJC delayed?
- 16% of PDX–SJC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 10 minutes.
- Which airline is most reliable from PDX to SJC?
- Alaska Airlines has the best on-time record on this route at 94%, based on 169 flights. 4 airlines flew PDX–SJC frequently enough to compare in this period.
- What is the best time of day to fly from PDX to SJC?
- Departures around 5 a.m. have the best record (98% on-time), while departures around 8 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PDX to SJC?
- The scheduled PDX–SJC flight time averages 1h 49m over 569 miles. Actual arrival times vary — flights on this route land 15+ minutes late 16% of the time.
- How often are PDX to SJC flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from PDX to SJC?
- June 2025 was the roughest month in this dataset, with only 72% of arrivals on time. The best was December 2024 at 90%. If your dates are flexible, that 18-point gap is worth planning around.
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Based on 3,846 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.