Best Time to Fly STS to PDX: On-Time Stats by Hour & Airline
Charles M. Schulz - Sonoma County → Portland International
Data through July 2026 · Last updated October 18, 2026
609 flights were scheduled from Santa Rosa (STS) to Portland (PDX) in the last 12 months, and 91.0% of those that flew arrived on time, 13.3 points above the US average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
July has been the best month (98% on time) and Sunday the weakest day of the week (81%).
1.6% of flights were cancelled, versus 1.8% nationally.
STS 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 |
|---|---|---|---|---|
| SkyWest Airlines | 90.8% | 66 min | 0.5% | 583 |
| Alaska Airlines | Limited data | 26 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STS to PDX
On-time arrival % by scheduled departure hour (local time), 957 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 26 | |
| 7am–8am | 95.9% | 1.4% | 74 |
| 11am–12pm | 92.0% | 0.0% | 199 |
| 12pm–1pm | 90.5% | 0.0% | 116 |
| 2pm–3pm | 88.6% | 0.0% | 35 |
| 3pm–4pm | Limited data | 21 | |
| 5pm–6pm | 82.3% | 0.0% | 68 |
| 6pm–7pm | 88.0% | 0.6% | 159 |
| 7pm–8pm | 77.8% | 1.5% | 206 |
| 8pm–9pm | 84.6% | 0.0% | 53 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STS 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) | Limited data | 19 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 73.2% | -13.5 pts | 0.0% | 42 |
| Summer peak (Jun 15 - Aug 15) | 94.7% | +8.0 pts | 0.7% | 152 |
| All other days | 86.7% | — | 1.3% | 744 |
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).