UA 1459 then UA 3237 at Houston
Port of Spain → Houston → Mc Allen
Timetable, Houston time
05:28UA 1459 from Port of Spain at the gate
19:45UA 3237 to Mc Allen leaves the gate
14 h 17 apart on the timetable
UA 3237 leaves 14 h 17 after UA 1459 arrives on the timetable: more than half a day, so not a connection we count.