Best Time to Fly SAN to STS: On-Time Stats by Hour & Airline
San Diego International → Charles M. Schulz - Sonoma County
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.3% of San Diego (SAN) to Santa Rosa (STS) flights arrived on time (1,014 scheduled flights). That is 0.6 points above the national average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 80.2% on time and Southwest Airlines was last with 69.7%.
Over 24 months, Tuesday was the most reliable day (83% on time) and December the worst month (56%).
The cancellation rate was 3.5% (US average 1.8%).
SAN 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 | 80.2% | 49 min | 3.9% | 832 |
| Southwest Airlines | 69.7% | 44 min | 1.6% | 182 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to STS
On-time arrival % by scheduled departure hour (local time), 1,756 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 86.9% | 0.0% | 99 |
| 8am–9am | 78.0% | 0.0% | 428 |
| 9am–10am | 77.8% | 2.3% | 173 |
| 12pm–1pm | 72.2% | 0.6% | 175 |
| 1pm–2pm | Limited data | 6 | |
| 2pm–3pm | Limited data | 26 | |
| 3pm–4pm | Limited data | 14 | |
| 4pm–5pm | Limited data | 25 | |
| 5pm–6pm | 72.0% | 0.0% | 76 |
| 6pm–7pm | Limited data | 8 | |
| 7pm–8pm | Limited data | 12 | |
| 8pm–9pm | 61.5% | 7.1% | 182 |
| 9pm–10pm | 74.8% | 6.1% | 528 |
| 10pm–11pm | Limited data | 4 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAN 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) | 61.8% | -13.9 pts | 7.9% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 47.5% | -28.2 pts | 10.1% | 69 |
| Summer peak (Jun 15 - Aug 15) | 77.5% | +1.8 pts | 2.1% | 325 |
| All other days | 75.7% | — | 2.6% | 1,324 |
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).