San Diego (SAN) to Santa Rosa (STS): On-Time Performance
Data through July 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
- 2.9%
- Flights/day
- 2.8
- last 12 months
- Duration
- 1h 54m
- scheduled
- Distance
- 508 mi
Best airline from SAN to STS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 75% | 14 min | 3.0% | 1,636 |
| Southwest Airlines | 69% | 15 min | 1.6% | 182 |
Monthly on-time trend
Best time to fly from SAN to STS
Aim for departures around 7 a.m. (85% on-time); avoid 8 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 12 min |
| Tuesdaybest | 83% | 9 min |
| Wednesday | 79% | 10 min |
| Thursday | 78% | 14 min |
| Friday | 62% | 21 min |
| Saturday | 79% | 11 min |
| Sunday | 68% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft46%
- Airline operations19%
- National airspace system26%
- Weather10%
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 2024-07 and 2026-07. 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 75%, based on 1,636 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 (85% on-time), while departures around 8 p.m. have the worst (63%). 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?
- 2.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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 1,818 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.