AC 4121 then AS 372 at San Francisco
Ontario → San Francisco → Los Angeles
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
12:00AS 372 to Los Angeles leaves the gatealso QR 2000, TN 2357, IB 7284, BA 7612
18 h 10 apart on the timetable, overnight
AS 372 leaves 18 h 10 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.