SLC → ONT: cancellations & delays
Over Jan 2023 - Apr 2026, 1.1% of Salt Lake City International Airport (SLC) to Ontario International Airport (ONT) flights were cancelled and 12.2% arrived at least 15 minutes late, across 3,913 flights, flown by DL, OO, F9. Cancellations peak in July.
Check today's live SLC departures →Airport pages: Salt Lake City International Airport (SLC) · Ontario International Airport (ONT)
Rates are historical averages from U.S. DOT (BTS) on-time records; a specific flight's live estimate can differ with weather and the day's disruptions.