UA 4301 then DL 1532 at Houston
Lubbock → Houston → Salt Lake City
Timetable, Houston time
18:41UA 4301 from Lubbock at the gate
14:24DL 1532 to Salt Lake City leaves the gate
19 h 43 apart on the timetable, overnight
DL 1532 leaves 19 h 43 after UA 4301 arrives on the timetable: more than half a day, so not a connection we count.