UA 4301 then DL 1914 at Houston
Lubbock → Houston → Detroit
Timetable, Houston time
18:41UA 4301 from Lubbock at the gate
11:22DL 1914 to Detroit leaves the gate
16 h 41 apart on the timetable, overnight
DL 1914 leaves 16 h 41 after UA 4301 arrives on the timetable: more than half a day, so not a connection we count.