UA 1997 then DL 8841 at Dulles
Orlando (MCO) → Washington → Toronto Pearson
Timetable, Washington time
21:28UA 1997 from Orlando (MCO) at the gate
16:00DL 8841 to Toronto Pearson leaves the gate
18 h 32 apart on the timetable, overnight
DL 8841 leaves 18 h 32 after UA 1997 arrives on the timetable: more than half a day, so not a connection we count.