Oakland (OAK) to Portland (PDX): On-Time Performance
Data through May 2026
Oakland (OAK) to Portland (PDX) effectively runs on two schedules. In January 2026, 94% of arrivals were on time; in May 2026 that fell to 70% — a 24-point seasonal swing. Across the full period the route averages 83% on-time against a national 78%. Morning departures also hold up better than evening ones (94% vs 74%), which matters most in the rough months.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 3.5
- last 12 months
- Duration
- 1h 40m
- scheduled
- Distance
- 543 mi
Best airline from OAK to PDX
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 84% | 9 min | 0.0% | 92 |
| Southwest Airlines | 83% | 9 min | 0.3% | 2,672 |
Monthly on-time trend
Best time to fly from OAK to PDX
Aim for departures around 5 a.m. (99% on-time); avoid 9 p.m. departures (50%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 9 min |
| Tuesdaybest | 90% | 6 min |
| Wednesday | 87% | 6 min |
| Thursday | 82% | 10 min |
| Friday | 79% | 14 min |
| Saturday | 86% | 6 min |
| Sunday | 78% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft65%
- Airline operations30%
- National airspace system3%
- Security1%
Frequently asked questions
- How often are flights from OAK to PDX delayed?
- 17% of OAK–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 OAK to PDX?
- SkyWest Airlines has the best on-time record on this route at 84%, based on 92 flights. 2 airlines flew OAK–PDX frequently enough to compare in this period.
- What is the best time of day to fly from OAK to PDX?
- Departures around 5 a.m. have the best record (99% on-time), while departures around 9 p.m. have the worst (50%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from OAK to PDX?
- The scheduled OAK–PDX flight time averages 1h 40m over 543 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are OAK to PDX 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 OAK to PDX?
- May 2026 was the roughest month in this dataset, with only 70% of arrivals on time. The best was January 2026 at 94%. If your dates are flexible, that 24-point gap is worth planning around.
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Based on 2,780 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.