AC 8540 then UA 4950 at Dulles
Toronto (YTZ) → Washington → Ithaca
Timetable, Washington time
16:47AC 8540 from Toronto (YTZ) at the gate
08:14UA 4950 to Ithaca leaves the gate
15 h 27 apart on the timetable, overnight
UA 4950 leaves 15 h 27 after AC 8540 arrives on the timetable: more than half a day, so not a connection we count.