DL 420 then AA 4541 at O'Hare
Savannah → Chicago → Indianapolis
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
12:38AA 4541 to Indianapolis leaves the gate
23 h 25 apart on the timetable, overnight
AA 4541 leaves 23 h 25 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.