Seattle (SEA) to Santa Rosa (STS) flights
Alaska Airlines, SkyWest Airlines fly nonstop from Seattle-Tacoma International Airport to Charles M. Schulz Sonoma County Airport, with about 14 flights a week in July 2026. The 618-mile flight takes about 2h 0m gate to gate.
- Distance
- 618 mi · 995 km
- Flight time
- 2h 0m
- Airlines
- 2
- Seats filled
- 76%
Airlines flying SEA to STS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 7 | Boeing 737-800, Boeing 737 MAX 8, Boeing 737-900ER | 41,807 | 2h 0m |
| SkyWest Airlines | 7 | Embraer E175 | 4,366 | 2h 4m |
| Horizon AirSeasonal or ended | n/a | Embraer E175 | 14,571 | 1h 58m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to STS flight schedule
3 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 9:54am and the last at 8:44pm. 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 1321Alaska Airlines | 9:54am | 11:58am | 31 | 82% |
| AS 1330Alaska Airlines | 7:57pm | 9:59pm | 13 | 85% |
| AS 3410Alaska Airlines · operated by SkyWest Airlines | 8:44pm | 10:51pm | 10 | 61% |
Is SEA to STS on time?
From September 2025 to August 2026, 83% of 684 flights arrived within 15 minutes of schedule and 2.6% were cancelled. Flights leaving around 4pm were the most punctual (97%), those around 8pm the least (71%). Most delay time was caused by late-arriving aircraft (41%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 684 | 83% | 8 min | 2.6% |
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 |
|---|---|---|---|
| 8am to 9am | 105 | 84% | |
| 9am to 10am | 70 | 80% | |
| 10am to 11am | 62 | 92% | |
| 11am to 12pm | 126 | 78% | |
| 4pm to 5pm | 35 | 97% | |
| 5pm to 6pm | 28 | 71% | |
| 6pm to 7pm | 32 | 100% | |
| 7pm to 8pm | 64 | 86% | |
| 8pm to 9pm | 112 | 71% | |
| 9pm to 10pm | 40 | 94% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 61 | 6,748 | |
| September 2025 | 59 | 6,991 | |
| October 2025 | 62 | 5,804 | |
| November 2025 | 59 | 4,851 | |
| December 2025 | 47 | 4,555 | |
| January 2026 | 42 | 2,791 | |
| February 2026 | 50 | 2,979 | |
| March 2026 | 60 | 4,254 | |
| April 2026 | 57 | 5,116 | |
| May 2026 | 61 | 5,384 | |
| June 2026 | 51 | 5,186 | |
| July 2026 | 60 | 6,085 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.