UA 3236 then AA 2357 at Houston
Mc Allen → Houston → Phoenix
Timetable, Houston time
20:10UA 3236 from Mc Allen at the gate
14:45AA 2357 to Phoenix leaves the gate
18 h 35 apart on the timetable, overnight
AA 2357 leaves 18 h 35 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.