UA 4522 then AA 5447 at Dulles
Huntsville → Washington → Charlotte
Timetable, Washington time
16:15UA 4522 from Huntsville at the gate
15:55AA 5447 to Charlotte leaves the gate
23 h 40 apart on the timetable, overnight
AA 5447 leaves 23 h 40 after UA 4522 arrives on the timetable: more than half a day, so not a connection we count.