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

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

Among 365 scheduled United Airlines flights from ONT to IAH, 89.3% arrived on time, 6.0% arrived at least 30 minutes late, and 0.5% 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
89.3%arrived on time
6.0%30+ min late
0.5%cancelled
365scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late6.0%
60+ minutes late3.3%
Cancelled0.5%
Average arrival+4.3 mincompleted flights

What did United Airlines ONT to IAH record?

United Airlines completed 99.5% of its scheduled reportable ONT to IAH flights in the observation window. 89.3% of all scheduled flights arrived less than 15 minutes late, while 3.3% arrived at least an hour late.

What were United Airlines ONT to IAH disruption rates?

For United Airlines ONT-to-IAH flights, 6.0% arrived at least 30 minutes late, 0.5% were cancelled, and 0.0% were diverted.

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What was the United Airlines ONT to IAH scheduled cohort?

The United Airlines ONT-to-IAH cohort contained 365 scheduled flights; 363 completed, 2 were cancelled, and 0 were diverted.

Not a prediction.

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