Delta Air Lines departures from Ontario, CA (ONT)

Among 1,868 scheduled Delta Air Lines flights departing ONT, 89.3% arrived on time, 5.9% arrived at least 30 minutes late, and 1.4% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Origin and marketing-carrier cohort · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption

89.3%arrived on time

5.9%30+ min late

1.4%cancelled

1,868scheduled flights

Based on July 2025–June 2026; on time means arrival less than 15 minutes late.

30+ minutes late5.9%

60+ minutes late3.8%

Cancelled1.4%

Diverted0.4%

What does the Delta Air Lines ONT sample show?

Delta Air Lines completed 98.1% of its scheduled departures from ONT; 3.8% arrived at least one hour late and 0.4% were diverted.

What were Delta Air Lines at ONT disruption rates?

For Delta Air Lines departures from ONT, 5.9% arrived at least 30 minutes late, 1.4% were cancelled, and 0.4% were diverted.

Compare all airlines at ONT

How large was the Delta Air Lines cohort at ONT?

The Delta Air Lines cohort at ONT contained 1,868 scheduled flights, including 1,833 completed flights, 27 cancellations, and 8 diversions.