BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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ONT→DEN

United Airlines Ontario, CA (ONT) to Denver, CO (DEN) reliability

Among 853 scheduled United Airlines flights from ONT to DEN, 84.4% arrived on time, 10.0% arrived at least 30 minutes late, and 0.4% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: United Airlines (UA) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
84.4%arrived on time
10.0%30+ min late
0.4%cancelled
853scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late10.0%
60+ minutes late6.4%
Cancelled0.4%
Average arrival+2.3 mincompleted flights

What did United Airlines ONT to DEN record?

United Airlines completed 99.2% of its scheduled reportable ONT to DEN flights in the observation window. 84.4% of all scheduled flights arrived less than 15 minutes late, while 6.4% arrived at least an hour late.

What were United Airlines ONT to DEN disruption rates?

For United Airlines ONT-to-DEN flights, 10.0% arrived at least 30 minutes late, 0.4% were cancelled, and 0.5% were diverted.

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What was the United Airlines ONT to DEN scheduled cohort?

The United Airlines ONT-to-DEN cohort contained 853 scheduled flights; 846 completed, 3 were cancelled, and 4 were diverted.

Not a prediction.

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