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

United Airlines Houston, TX (IAH) to Ontario, CA (ONT) reliability

Among 365 scheduled United Airlines flights from IAH to ONT, 77.5% arrived on time, 15.6% arrived at least 30 minutes late, and 0.0% 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 SIGNALGenerally reliable
77.5%arrived on time
15.6%30+ min late
0.0%cancelled
365scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late15.6%
60+ minutes late9.0%
Cancelled0.0%
Average arrival+6.9 mincompleted flights

What did United Airlines IAH to ONT record?

United Airlines completed 99.7% of its scheduled reportable IAH to ONT flights in the observation window. 77.5% of all scheduled flights arrived less than 15 minutes late, while 9.0% arrived at least an hour late.

What were United Airlines IAH to ONT disruption rates?

For United Airlines IAH-to-ONT flights, 15.6% arrived at least 30 minutes late, 0.0% were cancelled, and 0.3% were diverted.

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What was the United Airlines IAH to ONT scheduled cohort?

The United Airlines IAH-to-ONT cohort contained 365 scheduled flights; 364 completed, 0 were cancelled, and 1 were diverted.

Not a prediction.

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