AA 3521 then AA 5599 at Charlotte
Valparaiso → Charlotte → Springfield
Timetable, Charlotte time
15:37AA 3521 from Valparaiso at the gate
15:36AA 5599 to Springfield leaves the gate
23 h 59 apart on the timetable, overnight
AA 5599 leaves 23 h 59 after AA 3521 arrives on the timetable: more than half a day, so not a connection we count.