DL 3968 then AA 707 at Seattle
Vancouver → Seattle → Dallas-Fort Worth
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
10:27AA 707 to Dallas-Fort Worth leaves the gate
17 h 34 apart on the timetable, overnight
AA 707 leaves 17 h 34 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.