AC 4121 then AS 2400 at San Francisco
Ontario → San Francisco → Palm Springs
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
16:52AS 2400 to Palm Springs leaves the gatealso BA 6415
23 h 02 apart on the timetable, overnight
AS 2400 leaves 23 h 02 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.