Best Time to Fly PDX to STS: On-Time Stats by Hour & Airline
Portland International → Charles M. Schulz - Sonoma County
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 84.3% of Portland (PDX) to Santa Rosa (STS) flights arrived on time (640 scheduled flights). That is 6.7 points above the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Thursday was the most reliable day (88% on time) and November the worst month (71%).
The cancellation rate was 0.5% (US average 1.8%).
PDX to STS 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 | 84.5% | 65 min | 0.3% | 614 |
| Alaska Airlines | Limited data | 26 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to STS
On-time arrival % by scheduled departure hour (local time), 990 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | 75.5% | 0.7% | 291 |
| 10am–11am | Limited data | 5 | |
| 2pm–3pm | 93.7% | 0.0% | 142 |
| 3pm–4pm | 85.6% | 0.0% | 112 |
| 4pm–5pm | 85.7% | 0.0% | 112 |
| 5pm–6pm | 78.8% | 0.0% | 170 |
| 6pm–7pm | 78.7% | 1.1% | 90 |
| 9pm–10pm | 89.4% | 0.0% | 67 |
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 STS
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) | 78.0% | -4.7 pts | 0.0% | 42 |
| Summer peak (Jun 15 - Aug 15) | 84.3% | +1.6 pts | 0.0% | 148 |
| All other days | 82.8% | — | 0.4% | 781 |
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).