UA 491 then UA 3237 at Houston
Los Angeles → Houston → Mc Allen
Timetable, Houston time
06:10UA 491 from Los Angeles at the gate
19:45UA 3237 to Mc Allen leaves the gate
13 h 35 apart on the timetable
UA 3237 leaves 13 h 35 after UA 491 arrives on the timetable: more than half a day, so not a connection we count.