UA 4019 then UA 534 at Houston
Little Rock → Houston → Denver
Timetable, Houston time
08:40UA 4019 from Little Rock at the gate
08:30UA 534 to Denver leaves the gate
23 h 50 apart on the timetable, overnight
UA 534 leaves 23 h 50 after UA 4019 arrives on the timetable: more than half a day, so not a connection we count.