DL 1119 then UA 4749 at Detroit
Savannah → Detroit → Chicago O'Hare
Timetable, Detroit time
14:04DL 1119 from Savannah at the gate
10:48UA 4749 to Chicago O'Hare leaves the gate
20 h 44 apart on the timetable, overnight
UA 4749 leaves 20 h 44 after DL 1119 arrives on the timetable: more than half a day, so not a connection we count.