DL 420 then UA 441 at O'Hare
Savannah → Chicago → Dallas-Fort Worth
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
11:47UA 441 to Dallas-Fort Worth leaves the gate
22 h 34 apart on the timetable, overnight
UA 441 leaves 22 h 34 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.