San Diego (SAN) to Santa Rosa (STS) flights
SkyWest Airlines, Southwest Airlines, Horizon Air fly nonstop from San Diego International Airport to Charles M. Schulz Sonoma County Airport, with about 31 flights a week in July 2026. The 508-mile flight takes about 1h 47m gate to gate.
- Distance
- 508 mi · 818 km
- Flight time
- 1h 47m
- Airlines
- 3
- Seats filled
- 75%
Airlines flying SAN to STS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| SkyWest Airlines | 14 | Embraer E175, Bombardier CRJ200 | 48,084 | 1h 50m |
| Southwest Airlines | 11 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8 | 14,910 | 1h 35m |
| Horizon Air | 6 | Embraer E175 | 4,948 | 1h 41m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SAN to STS flight schedule
9 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 7:57am and the last at 9:50pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 3445Alaska Airlines · operated by SkyWest Airlines | 7:57am | 9:54am | 13 | 84% |
| AS 3233Alaska Airlines · operated by SkyWest Airlines | 8:24am | 10:24am | 18 | 91% |
| WN 2233Southwest Airlines | 8:35am | 10:20am | 16 | 88% |
| AS 3045Alaska Airlines · operated by SkyWest Airlines | 12:15pm | 2:12pm | 13 | 77% |
| AS 2258Alaska Airlines · operated by Horizon Air | 4:37pm | 6:23pm | 18 | 49% |
| WN 2622Southwest Airlines | 7:40pm | 9:25pm | 12 | 92% |
| WN 3129Southwest Airlines | 8:50pm | 10:35pm | 12 | 33% |
| AS 3302Alaska Airlines · operated by SkyWest Airlines | 9:03pm | 10:58pm | 28 | 78% |
| WN 1405Southwest Airlines | 9:50pm | 11:35pm | 4 | n/a |
Is SAN to STS on time?
From September 2025 to August 2026, 75% of 1,166 flights arrived within 15 minutes of schedule and 4.1% were cancelled. Flights leaving around 8am were the most punctual (89%), those around 4pm the least (53%). Most delay time was caused by late-arriving aircraft (62%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 935 | 76% | 14 min | 4.8% |
| Southwest Airlines | 231 | 69% | 16 min | 1.3% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 81 | 88% | |
| 8am to 9am | 186 | 89% | |
| 9am to 10am | 96 | 83% | |
| 12pm to 1pm | 172 | 73% | |
| 2pm to 3pm | 26 | 65% | |
| 4pm to 5pm | 76 | 53% | |
| 5pm to 6pm | 78 | 73% | |
| 8pm to 9pm | 79 | 55% | |
| 9pm to 10pm | 348 | 72% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 71 | 4,408 | |
| September 2025 | 79 | 4,515 | |
| October 2025 | 81 | 4,839 | |
| November 2025 | 77 | 4,525 | |
| December 2025 | 51 | 3,375 | |
| January 2026 | 49 | 2,897 | |
| February 2026 | 43 | 2,955 | |
| March 2026 | 69 | 4,414 | |
| April 2026 | 121 | 7,809 | |
| May 2026 | 137 | 9,255 | |
| June 2026 | 136 | 9,266 | |
| July 2026 | 136 | 9,684 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.