DL 4634 then DL 1633 at Detroit
Indianapolis → Detroit → Houston
Timetable, Detroit time
07:55DL 4634 from Indianapolis at the gate
20:15DL 1633 to Houston leaves the gate
12 h 20 apart on the timetable
DL 1633 leaves 12 h 20 after DL 4634 arrives on the timetable: more than half a day, so not a connection we count.