DL 3913 then AC 8807 at Seattle
Portland (Oregon) → Seattle → Vancouver
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
15:15AC 8807 to Vancouver leaves the gate
18 h 25 apart on the timetable, overnight
AC 8807 leaves 18 h 25 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.