AA 1268 then DL 5714 at Philadelphia
Kansas City → Philadelphia → Boston
Timetable, Philadelphia time
20:18AA 1268 from Kansas City at the gate
19:55DL 5714 to Boston leaves the gate
23 h 37 apart on the timetable, overnight
DL 5714 leaves 23 h 37 after AA 1268 arrives on the timetable: more than half a day, so not a connection we count.