DL 420 then UA 5378 at O'Hare
Savannah → Chicago → Green Bay
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
11:29UA 5378 to Green Bay leaves the gate
22 h 16 apart on the timetable, overnight
UA 5378 leaves 22 h 16 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.