UA 4342 then LN 744 at Dulles
Charlottesville → Washington → Buffalo
Timetable, Washington time
07:11UA 4342 from Charlottesville at the gate
04:00LN 744 to Buffalo leaves the gate
20 h 49 apart on the timetable, overnight
LN 744 leaves 20 h 49 after UA 4342 arrives on the timetable: more than half a day, so not a connection we count.