MDW → ONT: cancellations & delays
Over Jan 2023 - Apr 2026, 0.9% of Chicago Midway International Airport (MDW) to Ontario International Airport (ONT) flights were cancelled and 21.9% arrived at least 15 minutes late, across 1,199 flights, flown by WN, F9. Cancellations peak in January.
Check today's live MDW departures →Airport pages: Chicago Midway International Airport (MDW) · 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.