UA 262 then DL 8844 at Atlanta
Houston → Atlanta → Detroit
Timetable, Atlanta time
21:11UA 262 from Houston at the gate
09:28DL 8844 to Detroit leaves the gate
12 h 17 apart on the timetable, overnight
DL 8844 leaves 12 h 17 after UA 262 arrives on the timetable: more than half a day, so not a connection we count.