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

Southwest Airlines Oakland, CA (OAK) to Ontario, CA (ONT) reliability

Among 1,489 scheduled Southwest Airlines flights from OAK to ONT, 82.1% arrived on time, 10.3% 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: Southwest Airlines (WN) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
82.1%arrived on time
10.3%30+ min late
0.4%cancelled
1,489scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late10.3%
60+ minutes late4.3%
Cancelled0.4%
Average arrival+1.9 mincompleted flights

What did Southwest Airlines OAK to ONT record?

Southwest Airlines completed 99.5% of its scheduled reportable OAK to ONT flights in the observation window. 82.1% of all scheduled flights arrived less than 15 minutes late, while 4.3% arrived at least an hour late.

What were Southwest Airlines OAK to ONT disruption rates?

For Southwest Airlines OAK-to-ONT flights, 10.3% arrived at least 30 minutes late, 0.4% were cancelled, and 0.1% were diverted.

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What was the Southwest Airlines OAK to ONT scheduled cohort?

The Southwest Airlines OAK-to-ONT cohort contained 1,489 scheduled flights; 1,482 completed, 6 were cancelled, and 1 were diverted.

Not a prediction.

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