San Francisco (SFO) to Ontario (ONT) flights
United Airlines, Frontier Airlines, SkyWest Airlines fly nonstop from San Francisco International Airport to Ontario International Airport, with about 28 flights a week in July 2026. The 363-mile flight takes about 1h 26m gate to gate.
- Distance
- 363 mi · 584 km
- Flight time
- 1h 26m
- Airlines
- 3
- Seats filled
- 72%
Airlines flying SFO to ONT
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 14 | Boeing 737 MAX 9, Airbus A320-100/200, Boeing 737 MAX 8 | 115,068 | 1h 26m |
| Frontier Airlines | 7 | Airbus A320neo, Airbus A321, Airbus A320-100/200 | 25,280 | 1h 25m |
| SkyWest Airlines | 7 | Embraer E175, Bombardier CRJ700 | 7,766 | 1h 32m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SFO to ONT flight schedule
6 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 9:33am and the last at 9:25pm. 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) |
|---|---|---|---|---|
| F9 2678Frontier Airlines | 9:33am | 11:02am | 31 | 60% |
| UA 2661United Airlines | 10:37am | 12:12pm | 31 | 77% |
| UA 5613United Airlines · operated by SkyWest Airlines | 4:17pm | 5:54pm | 7 | 65% |
| UA 2619United Airlines | 4:40pm | 6:11pm | 18 | 78% |
| UA 2478United Airlines | 6:30pm | 8:01pm | 21 | 86% |
| UA 552United Airlines | 9:25pm | 10:59pm | 22 | 80% |
Is SFO to ONT on time?
From September 2025 to August 2026, 77% of 1,337 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 8am were the most punctual (86%), those around 10pm the least (42%). Most delay time was caused by late-arriving aircraft (51%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,126 | 80% | 12 min | 0.5% |
| Frontier Airlines | 211 | 60% | 32 min | 2.4% |
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 | 83 | 86% | |
| 9am to 10am | 107 | 79% | |
| 10am to 11am | 251 | 81% | |
| 11am to 12pm | 77 | 64% | |
| 4pm to 5pm | 351 | 81% | |
| 6pm to 7pm | 35 | 83% | |
| 9pm to 10pm | 310 | 74% | |
| 10pm to 11pm | 75 | 42% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 108 | 14,833 | |
| September 2025 | 108 | 14,785 | |
| October 2025 | 115 | 16,397 | |
| November 2025 | 104 | 14,059 | |
| December 2025 | 104 | 11,546 | |
| January 2026 | 92 | 7,912 | |
| February 2026 | 81 | 8,469 | |
| March 2026 | 103 | 11,473 | |
| April 2026 | 125 | 12,475 | |
| May 2026 | 126 | 12,561 | |
| June 2026 | 120 | 12,140 | |
| July 2026 | 126 | 11,724 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.