UA 376 then DL 8841 at Dulles
Austin → Washington → Toronto Pearson
Timetable, Washington time
21:20UA 376 from Austin at the gate
16:00DL 8841 to Toronto Pearson leaves the gate
18 h 40 apart on the timetable, overnight
DL 8841 leaves 18 h 40 after UA 376 arrives on the timetable: more than half a day, so not a connection we count.