Best Time to Fly PDX to OAK: On-Time Stats by Hour & Airline
Portland International → Oakland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.8% of Portland (PDX) to Oakland (OAK) flights arrived on time (1,287 scheduled flights). That is in line with the national average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 91.2%, while Southwest Airlines trailed at 76.2%.
January has been the best month (93% on time) and Thursday the weakest day of the week (77%).
0.7% of flights were cancelled, versus 1.8% nationally.
PDX to OAK 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 | 91.2% | 43 min | 0.0% | 113 |
| Southwest Airlines | 76.2% | 50 min | 0.8% | 1,158 |
| Alaska Airlines | Limited data | 16 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to OAK
On-time arrival % by scheduled departure hour (local time), 2,739 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.7% | 0.5% | 216 |
| 6am–7am | 97.6% | 0.3% | 330 |
| 7am–8am | 94.7% | 0.8% | 132 |
| 8am–9am | Limited data | 20 | |
| 9am–10am | 94.5% | 0.5% | 219 |
| 10am–11am | 81.9% | 1.1% | 375 |
| 11am–12pm | 87.3% | 0.0% | 71 |
| 12pm–1pm | 77.8% | 0.0% | 81 |
| 1pm–2pm | 73.3% | 0.0% | 86 |
| 2pm–3pm | 67.1% | 2.8% | 72 |
| 3pm–4pm | 87.3% | 0.0% | 79 |
| 4pm–5pm | 68.9% | 0.0% | 229 |
| 5pm–6pm | 68.0% | 0.5% | 223 |
| 6pm–7pm | 70.5% | 0.0% | 156 |
| 7pm–8pm | 75.5% | 0.0% | 110 |
| 8pm–9pm | 71.6% | 0.0% | 134 |
| 9pm–10pm | 55.9% | 1.2% | 172 |
| 10pm–11pm | 35.3% | 0.0% | 34 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PDX to OAK
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) | 76.8% | -6.7 pts | 1.8% | 57 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.9% | -11.6 pts | 0.0% | 121 |
| Summer peak (Jun 15 - Aug 15) | 69.6% | -13.9 pts | 0.8% | 492 |
| All other days | 83.5% | — | 0.4% | 2,069 |
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).