Delta Air Lines Ontario, CA (ONT) to Salt Lake City, UT (SLC) reliability

Among 902 scheduled Delta Air Lines flights from ONT to SLC, 90.6% arrived on time, 5.8% arrived at least 30 minutes late, and 1.1% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: Delta Air Lines (DL) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption

90.6%arrived on time

5.8%30+ min late

1.1%cancelled

902scheduled flights

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

30+ minutes late5.8%

60+ minutes late3.4%

Cancelled1.1%

Average arrival-5.9 mincompleted flights

What did Delta Air Lines ONT to SLC record?

Delta Air Lines completed 98.8% of its scheduled reportable ONT to SLC flights in the observation window. 90.6% of all scheduled flights arrived less than 15 minutes late, while 3.4% arrived at least an hour late.

What were Delta Air Lines ONT to SLC disruption rates?

For Delta Air Lines ONT-to-SLC flights, 5.8% arrived at least 30 minutes late, 1.1% were cancelled, and 0.1% were diverted.

Compare all airlines on this route

What was the Delta Air Lines ONT to SLC scheduled cohort?

The Delta Air Lines ONT-to-SLC cohort contained 902 scheduled flights; 891 completed, 10 were cancelled, and 1 were diverted.

Not a prediction.

This is a descriptive historical rate. Schedule changes, seasonal operations and current conditions may differ.