AA 821 then VA 8393 at San Francisco
Chicago O'Hare → San Francisco → Miami
Timetable, San Francisco time
18:14AA 821 from Chicago O'Hare at the gatealso QF 4642
07:00VA 8393 to Miami leaves the gate
12 h 46 apart on the timetable, overnight
VA 8393 leaves 12 h 46 after AA 821 arrives on the timetable: more than half a day, so not a connection we count.