DL 3968 then AM 495 at Seattle
Vancouver → Seattle → Mexico City
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
09:30AM 495 to Mexico City leaves the gate
16 h 37 apart on the timetable, overnight
AM 495 leaves 16 h 37 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.