AC 591 then UA 4307 at Houston
Toronto → Houston → Northwest Arkansas
Timetable, Houston time
10:58AC 591 from Toronto at the gate
09:35UA 4307 to Northwest Arkansas leaves the gate
22 h 37 apart on the timetable, overnight
UA 4307 leaves 22 h 37 after AC 591 arrives on the timetable: more than half a day, so not a connection we count.