Ontario (ONT) to Salt Lake City (SLC) flights
Delta Air Lines, SkyWest Airlines fly nonstop from Ontario International Airport to Salt Lake City International Airport, with about 26 flights a week in July 2026. The 558-mile flight takes about 1h 43m gate to gate.
- Distance
- 558 mi · 898 km
- Flight time
- 1h 43m
- Airlines
- 2
- Seats filled
- 75%
Airlines flying ONT to SLC
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 19 | Airbus A220-300, Airbus A220-100, Boeing 737-800 | 90,983 | 1h 41m |
| SkyWest Airlines | 7 | Embraer E175 | 19,010 | 1h 47m |
| Frontier AirlinesSeasonal or ended | n/a | Airbus A320neo, Airbus A321, Airbus A320-100/200 | 1,466 | 1h 44m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ONT to SLC flight schedule
4 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 6:00am and the last at 5:05pm. 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) |
|---|---|---|---|---|
| DL 2708Delta Air Lines | 6:00am | 8:48am | 31 | 95% |
| DL 3974Delta Air Lines · operated by SkyWest Airlines | 9:43am | 12:37pm | 24 | 100% |
| DL 3172Delta Air Lines | 1:06pm | 3:53pm | 31 | 91% |
| DL 4443Delta Air Lines · operated by SkyWest Airlines | 5:05pm | 7:59pm | 31 | 88% |
Is ONT to SLC on time?
From September 2025 to August 2026, 91% of 1,239 flights arrived within 15 minutes of schedule and 0.9% were cancelled. Flights leaving around 9am were the most punctual (97%), those around 1pm the least (87%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (58%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 1,209 | 91% | 8 min | 0.9% |
| Frontier Airlines | 30 | 87% | 6 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 |
|---|---|---|---|
| 6am to 7am | 365 | 95% | |
| 9am to 10am | 147 | 97% | |
| 1pm to 2pm | 365 | 87% | |
| 4pm to 5pm | 124 | 93% | |
| 5pm to 6pm | 219 | 89% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 117 | 9,804 | |
| September 2025 | 110 | 9,402 | |
| October 2025 | 115 | 9,505 | |
| November 2025 | 85 | 8,004 | |
| December 2025 | 90 | 8,554 | |
| January 2026 | 91 | 8,152 | |
| February 2026 | 89 | 8,501 | |
| March 2026 | 90 | 8,627 | |
| April 2026 | 98 | 8,940 | |
| May 2026 | 114 | 10,978 | |
| June 2026 | 113 | 10,692 | |
| July 2026 | 116 | 10,300 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.