UA 3496 then OO 576 at Dulles
Jacksonville → Washington → Johnstown
Timetable, Washington time
13:35UA 3496 from Jacksonville at the gate
12:50OO 576 to Johnstown leaves the gate
23 h 15 apart on the timetable, overnight
OO 576 leaves 23 h 15 after UA 3496 arrives on the timetable: more than half a day, so not a connection we count.