AA 3308 then B6 1439 at Boston
Philadelphia → Boston → Austin
Timetable, Boston time
09:39AA 3308 from Philadelphia at the gate
09:32B6 1439 to Austin leaves the gate
23 h 53 apart on the timetable, overnight
B6 1439 leaves 23 h 53 after AA 3308 arrives on the timetable: more than half a day, so not a connection we count.