AA 3972 then G7 3376 at O'Hare
Bloomington-Normal → Chicago → St Louis
Timetable, Chicago time
15:45AA 3972 from Bloomington-Normal at the gate
11:00G7 3376 to St Louis leaves the gate
19 h 15 apart on the timetable, overnight
G7 3376 leaves 19 h 15 after AA 3972 arrives on the timetable: more than half a day, so not a connection we count.