G7 3375 then AA 3554 at O'Hare
St Louis → Chicago → Jacksonville
Timetable, Chicago time
17:47G7 3375 from St Louis at the gate
13:29AA 3554 to Jacksonville leaves the gate
19 h 42 apart on the timetable, overnight
AA 3554 leaves 19 h 42 after G7 3375 arrives on the timetable: more than half a day, so not a connection we count.