UA 4524 then UA 4307 at Houston
St Louis → Houston → Northwest Arkansas
Timetable, Houston time
11:01UA 4524 from St Louis at the gate
09:35UA 4307 to Northwest Arkansas leaves the gate
22 h 34 apart on the timetable, overnight
UA 4307 leaves 22 h 34 after UA 4524 arrives on the timetable: more than half a day, so not a connection we count.