UA 394 then UA 6146 at Houston
Toronto → Houston → Little Rock
Timetable, Houston time
18:42UA 394 from Toronto at the gate
18:10UA 6146 to Little Rock leaves the gate
23 h 28 apart on the timetable, overnight
UA 6146 leaves 23 h 28 after UA 394 arrives on the timetable: more than half a day, so not a connection we count.