DL 5626 then AA 5815 at Charlotte
Boston → Charlotte → Jacksonville (North Carolina)
Timetable, Charlotte time
09:00DL 5626 from Boston at the gate
21:20AA 5815 to Jacksonville (North Carolina) leaves the gate
12 h 20 apart on the timetable
AA 5815 leaves 12 h 20 after DL 5626 arrives on the timetable: more than half a day, so not a connection we count.