DL 3968 then AA 717 at Seattle
Vancouver → Seattle → Dallas-Fort Worth
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
14:07AA 717 to Dallas-Fort Worth leaves the gate
21 h 14 apart on the timetable, overnight
AA 717 leaves 21 h 14 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.