AC 4121 then BA 5357 at San Francisco
Ontario → San Francisco → Los Angeles
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
12:00BA 5357 to Los Angeles leaves the gatealso EI 7322
18 h 10 apart on the timetable, overnight
BA 5357 leaves 18 h 10 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.