San Jose (SJC) to Portland (PDX): On-Time Performance
Data through May 2026
When you fly SJC to PDX matters as much as anything else about the booking: the route swung from 92% on-time in January 2025 to just 75% in July 2025. Across the full period the route averages 86% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 76%), which matters most in the rough months.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 0.2%
- Flights/day
- 4.4
- last 12 months
- Duration
- 1h 48m
- scheduled
- Distance
- 569 mi
Best airline from SJC to PDX
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 92% | 8 min | 0.0% | 171 |
| SkyWest Airlines | 92% | 6 min | 0.1% | 1,276 |
| Spirit Airlines | 82% | 13 min | 1.8% | 114 |
| Southwest Airlines | 82% | 10 min | 0.1% | 2,282 |
Monthly on-time trend
Best time to fly from SJC to PDX
Aim for departures around 7 a.m. (98% on-time); avoid 9 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 87% | 7 min |
| Tuesday | 89% | 7 min |
| Wednesdaybest | 92% | 5 min |
| Thursday | 84% | 10 min |
| Friday | 80% | 14 min |
| Saturday | 90% | 7 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 aircraft68%
- Airline operations26%
- National airspace system6%
- Weather1%
Frequently asked questions
- How often are flights from SJC to PDX delayed?
- 14% of SJC–PDX 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 9 minutes.
- Which airline is most reliable from SJC to PDX?
- Alaska Airlines has the best on-time record on this route at 92%, based on 171 flights. 4 airlines flew SJC–PDX frequently enough to compare in this period.
- What is the best time of day to fly from SJC to PDX?
- Departures around 7 a.m. have the best record (98% on-time), while departures around 9 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SJC to PDX?
- The scheduled SJC–PDX flight time averages 1h 48m over 569 miles. Actual arrival times vary — flights on this route land 15+ minutes late 14% of the time.
- How often are SJC to PDX flights cancelled?
- 0.2% 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 SJC to PDX?
- July 2025 was the roughest month in this dataset, with only 75% of arrivals on time. The best was January 2025 at 92%. If your dates are flexible, that 17-point gap is worth planning around.
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Based on 3,843 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.