UA 4537 then UA 4307 at Houston
Northwest Arkansas → Houston → Northwest Arkansas
Timetable, Houston time
13:38UA 4537 from Northwest Arkansas at the gate
09:35UA 4307 to Northwest Arkansas leaves the gate
19 h 57 apart on the timetable, overnight
UA 4307 leaves 19 h 57 after UA 4537 arrives on the timetable: more than half a day, so not a connection we count.