UA 3236 then UA 1902 at Houston
Mc Allen → Houston → Guatemala City
Timetable, Houston time
20:10UA 3236 from Mc Allen at the gate
16:43UA 1902 to Guatemala City leaves the gate
20 h 33 apart on the timetable, overnight
UA 1902 leaves 20 h 33 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.