PHX → ONT: cancellations & delays
Over Jan 2023 - Apr 2026, 0.4% of Phoenix Sky Harbor International Airport (PHX) to Ontario International Airport (ONT) flights were cancelled and 19.1% arrived at least 15 minutes late, across 10,328 flights, flown by WN, AA, OO, MQ, F9. Cancellations peak in August.
Check today's live PHX departures →Airport pages: Phoenix Sky Harbor International Airport (PHX) · 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.