DL 3968 then AA 2870 at Seattle
Vancouver → Seattle → Philadelphia
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
12:49AA 2870 to Philadelphia leaves the gate
19 h 56 apart on the timetable, overnight
AA 2870 leaves 19 h 56 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.