Santa Rosa (STS) to Ontario (ONT) flights
SkyWest Airlines flies nonstop from Charles M. Schulz Sonoma County Airport to Ontario International Airport, with about 7 flights a week in July 2026. The 423-mile flight takes about 1h 27m gate to gate.
- Distance
- 423 mi · 681 km
- Flight time
- 1h 27m
- Airlines
- 1
- Seats filled
- 51%
Airlines flying STS to ONT
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| SkyWest Airlines | 7 | Embraer E175 | 4,139 | 1h 29m |
| Horizon AirSeasonal or ended | n/a | Embraer E175 | 1,164 | 1h 21m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STS to ONT flight schedule
2 flight numbers flew this route in August 2026. The first usually leaves at 2:09pm and the last at 4:35pm. 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 3032Alaska Airlines · operated by SkyWest Airlines | 2:09pm | 3:47pm | 13 | 92% |
| AS 3086Alaska Airlines · operated by SkyWest Airlines | 4:35pm | 6:03pm | 18 | 91% |
Is STS to ONT on time?
From September 2025 to August 2026, 92% of 167 flights arrived within 15 minutes of schedule and 0% were cancelled. Flights leaving around 5pm were the most punctual (100%), those around 2pm the least (90%). Most delay time was caused by late-arriving aircraft (85%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 167 | 92% | 7 min | 0% |
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 |
|---|---|---|---|
| 10am to 11am | 21 | 91% | |
| 2pm to 3pm | 48 | 90% | |
| 4pm to 5pm | 70 | 91% | |
| 5pm to 6pm | 28 | 100% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| December 2025 | 2 | 0 | |
| March 2026 | 14 | 543 | |
| April 2026 | 30 | 1,241 | |
| May 2026 | 31 | 1,239 | |
| June 2026 | 30 | 1,218 | |
| July 2026 | 31 | 1,062 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.