UA 5354 then AA 4040 at DFW
Houston → Dallas-Fort Worth → Brownsville
Timetable, Dallas-Fort Worth time
13:33UA 5354 from Houston at the gate
13:27AA 4040 to Brownsville leaves the gate
23 h 54 apart on the timetable, overnight
AA 4040 leaves 23 h 54 after UA 5354 arrives on the timetable: more than half a day, so not a connection we count.