UA 4975 then DL 8841 at Dulles
State College → Washington → Toronto Pearson
Timetable, Washington time
21:15UA 4975 from State College at the gate
16:00DL 8841 to Toronto Pearson leaves the gate
18 h 45 apart on the timetable, overnight
DL 8841 leaves 18 h 45 after UA 4975 arrives on the timetable: more than half a day, so not a connection we count.