UA 1241 then UA 4307 at Houston
Denver → Houston → Northwest Arkansas
Timetable, Houston time
13:31UA 1241 from Denver at the gate
09:35UA 4307 to Northwest Arkansas leaves the gate
20 h 04 apart on the timetable, overnight
UA 4307 leaves 20 h 04 after UA 1241 arrives on the timetable: more than half a day, so not a connection we count.