UA 6327 then UA 4307 at Houston
Monterrey → Houston → Northwest Arkansas
Timetable, Houston time
12:30UA 6327 from Monterrey at the gate
09:35UA 4307 to Northwest Arkansas leaves the gate
21 h 05 apart on the timetable, overnight
UA 4307 leaves 21 h 05 after UA 6327 arrives on the timetable: more than half a day, so not a connection we count.