UA 3236 then AA 1397 at Houston
Mc Allen → Houston → Dallas-Fort Worth
Timetable, Houston time
20:10UA 3236 from Mc Allen at the gate
14:08AA 1397 to Dallas-Fort Worth leaves the gate
17 h 58 apart on the timetable, overnight
AA 1397 leaves 17 h 58 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.