DL 420 then AA 4183 at O'Hare
Savannah → Chicago → Columbia Metropolitan
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
13:08AA 4183 to Columbia Metropolitan leaves the gate
23 h 55 apart on the timetable, overnight
AA 4183 leaves 23 h 55 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.