AA 2453 then DL 5845 at Boston
Los Angeles → Boston → Philadelphia
Timetable, Boston time
07:47AA 2453 from Los Angeles at the gate
06:40DL 5845 to Philadelphia leaves the gate
22 h 53 apart on the timetable, overnight
DL 5845 leaves 22 h 53 after AA 2453 arrives on the timetable: more than half a day, so not a connection we count.