United Airlines departures from Ontario, CA (ONT)

Among 2,516 scheduled United Airlines flights departing ONT, 78.8% arrived on time, 13.5% arrived at least 30 minutes late, and 0.4% 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 SIGNALGenerally reliable

78.8%arrived on time

13.5%30+ min late

0.4%cancelled

2,516scheduled flights

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

30+ minutes late13.5%

60+ minutes late7.1%

Cancelled0.4%

Diverted0.3%

What does the United Airlines ONT sample show?

United Airlines completed 99.3% of its scheduled departures from ONT; 7.1% arrived at least one hour late and 0.3% were diverted.

What were United Airlines at ONT disruption rates?

For United Airlines departures from ONT, 13.5% arrived at least 30 minutes late, 0.4% were cancelled, and 0.3% were diverted.

Compare all airlines at ONT

How large was the United Airlines cohort at ONT?

The United Airlines cohort at ONT contained 2,516 scheduled flights, including 2,498 completed flights, 11 cancellations, and 7 diversions.