DL 420 then AA 4571 at O'Hare
Savannah → Chicago → Grand Rapids
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
11:40AA 4571 to Grand Rapids leaves the gate
22 h 27 apart on the timetable, overnight
AA 4571 leaves 22 h 27 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.