AC 4121 then AA 1934 at San Francisco
Ontario → San Francisco → Miami
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
11:39AA 1934 to Miami leaves the gate
17 h 49 apart on the timetable, overnight
AA 1934 leaves 17 h 49 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.