DL 3968 then AA 580 at Seattle
Vancouver → Seattle → Charlotte
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
11:16AA 580 to Charlotte leaves the gate
18 h 23 apart on the timetable, overnight
AA 580 leaves 18 h 23 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.