UA 2250 then UA 3237 at Houston
Dallas-Fort Worth → Houston → Mc Allen
Timetable, Houston time
06:25UA 2250 from Dallas-Fort Worth at the gate
19:45UA 3237 to Mc Allen leaves the gate
13 h 20 apart on the timetable
UA 3237 leaves 13 h 20 after UA 2250 arrives on the timetable: more than half a day, so not a connection we count.