AA 3585 then DL 1655 at Boston
Louisville → Boston → San Francisco
Timetable, Boston time
16:55AA 3585 from Louisville at the gate
16:50DL 1655 to San Francisco leaves the gate
23 h 55 apart on the timetable, overnight
DL 1655 leaves 23 h 55 after AA 3585 arrives on the timetable: more than half a day, so not a connection we count.