LAS → ONT: cancellations & delays
Over Jan 2023 - Apr 2026, 0.8% of Harry Reid International Airport (LAS) to Ontario International Airport (ONT) flights were cancelled and 23.2% arrived at least 15 minutes late, across 8,787 flights, flown by WN, F9. Cancellations peak in August.
Check today's live LAS departures →Airport pages: Harry Reid International Airport (LAS) · 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.