DL 876 then UA 6251 at Detroit
Santa Ana → Detroit → Houston
Timetable, Detroit time
19:40DL 876 from Santa Ana at the gate
10:59UA 6251 to Houston leaves the gate
15 h 19 apart on the timetable, overnight
UA 6251 leaves 15 h 19 after DL 876 arrives on the timetable: more than half a day, so not a connection we count.