AA 3987 then AA 3129 at Charlotte
Springfield → Charlotte → Jacksonville
Timetable, Charlotte time
15:09AA 3987 from Springfield at the gate
15:02AA 3129 to Jacksonville leaves the gate
23 h 53 apart on the timetable, overnight
AA 3129 leaves 23 h 53 after AA 3987 arrives on the timetable: more than half a day, so not a connection we count.