San Diego (SAN) to Santa Rosa (STS): On-Time Performance
Data through May 2026
When you fly SAN to STS matters as much as anything else about the booking: the route swung from 85% on-time in March 2026 to just 52% in November 2024. Across the full period the route averages 74% on-time against a national 78%.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 2.7%
- Flights/day
- 2.5
- last 12 months
- Duration
- 1h 54m
- scheduled
- Distance
- 508 mi
Best airline from SAN to STS
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 74% | 14 min | 2.8% | 1,550 |
| Southwest Airlines | 69% | 14 min | 0.0% | 86 |
Monthly on-time trend
Best time to fly from SAN to STS
Aim for departures around 7 a.m. (84% on-time); avoid 8 p.m. departures (65%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 13 min |
| Tuesdaybest | 84% | 8 min |
| Wednesday | 80% | 9 min |
| Thursday | 77% | 14 min |
| Friday | 59% | 23 min |
| Saturday | 80% | 9 min |
| Sunday | 67% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft44%
- Airline operations20%
- National airspace system26%
- Weather11%
Frequently asked questions
- How often are flights from SAN to STS delayed?
- 26% of SAN–STS 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 14 minutes.
- Which airline is most reliable from SAN to STS?
- SkyWest Airlines has the best on-time record on this route at 74%, based on 1,550 flights. 2 airlines flew SAN–STS frequently enough to compare in this period.
- What is the best time of day to fly from SAN to STS?
- Departures around 7 a.m. have the best record (84% on-time), while departures around 8 p.m. have the worst (65%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAN to STS?
- The scheduled SAN–STS flight time averages 1h 54m over 508 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are SAN to STS flights cancelled?
- 2.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from SAN to STS?
- November 2024 was the roughest month in this dataset, with only 52% of arrivals on time. The best was March 2026 at 85%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 1,636 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.