AA 5188 then UA 3917 at Houston
Dallas-Fort Worth → Houston → Austin
Timetable, Houston time
09:54AA 5188 from Dallas-Fort Worth at the gate
07:30UA 3917 to Austin leaves the gate
21 h 36 apart on the timetable, overnight
UA 3917 leaves 21 h 36 after AA 5188 arrives on the timetable: more than half a day, so not a connection we count.