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

United Airlines Ontario, CA (ONT) to San Francisco, CA (SFO) reliability

Among 1,007 scheduled United Airlines flights from ONT to SFO, 70.4% arrived on time, 19.4% 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 SIGNALGenerally reliable
70.4%arrived on time
19.4%30+ min late
0.4%cancelled
1,007scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late19.4%
60+ minutes late9.3%
Cancelled0.4%
Average arrival+13.3 mincompleted flights

What did United Airlines ONT to SFO record?

United Airlines completed 99.6% of its scheduled reportable ONT to SFO flights in the observation window. 70.4% of all scheduled flights arrived less than 15 minutes late, while 9.3% arrived at least an hour late.

What were United Airlines ONT to SFO disruption rates?

For United Airlines ONT-to-SFO flights, 19.4% arrived at least 30 minutes late, 0.4% were cancelled, and 0.0% were diverted.

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What was the United Airlines ONT to SFO scheduled cohort?

The United Airlines ONT-to-SFO cohort contained 1,007 scheduled flights; 1,003 completed, 4 were cancelled, and 0 were diverted.

Not a prediction.

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