AC 4121 then AS 3210 at San Francisco
Ontario → San Francisco → Santa Ana
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
11:26AS 3210 to Santa Ana leaves the gate
17 h 36 apart on the timetable, overnight
AS 3210 leaves 17 h 36 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.