AA 3969 then G7 3376 at O'Hare
Hilton Head → Chicago → St Louis
Timetable, Chicago time
15:39AA 3969 from Hilton Head at the gate
11:00G7 3376 to St Louis leaves the gate
19 h 21 apart on the timetable, overnight
G7 3376 leaves 19 h 21 after AA 3969 arrives on the timetable: more than half a day, so not a connection we count.