DL 541 then DL 8841 at Dulles
Seattle → Washington → Toronto Pearson
Timetable, Washington time
00:20DL 541 from Seattle at the gate
16:00DL 8841 to Toronto Pearson leaves the gate
15 h 40 apart on the timetable
DL 8841 leaves 15 h 40 after DL 541 arrives on the timetable: more than half a day, so not a connection we count.