ONT → LAS: cancellations & delays
Over Jan 2023 - Apr 2026, 0.9% of Ontario International Airport (ONT) to Harry Reid International Airport (LAS) flights were cancelled and 22.2% arrived at least 15 minutes late, across 8,820 flights, flown by WN, F9. Cancellations peak in August.
Check today's live ONT departures →Airport pages: Ontario International Airport (ONT) · Harry Reid International Airport (LAS)
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.