UA 855 then UA 3237 at Houston
Lima → Houston → Mc Allen
Timetable, Houston time
07:30UA 855 from Lima at the gate
19:45UA 3237 to Mc Allen leaves the gate
12 h 15 apart on the timetable
UA 3237 leaves 12 h 15 after UA 855 arrives on the timetable: more than half a day, so not a connection we count.