UA 580 then UA 3237 at Houston
Los Angeles → Houston → Mc Allen
Timetable, Houston time
05:13UA 580 from Los Angeles at the gate
19:45UA 3237 to Mc Allen leaves the gate
14 h 32 apart on the timetable
UA 3237 leaves 14 h 32 after UA 580 arrives on the timetable: more than half a day, so not a connection we count.