AA 4980 then UA 3917 at Houston
Dallas-Fort Worth → Houston → Austin
Timetable, Houston time
11:22AA 4980 from Dallas-Fort Worth at the gate
07:30UA 3917 to Austin leaves the gate
20 h 08 apart on the timetable, overnight
UA 3917 leaves 20 h 08 after AA 4980 arrives on the timetable: more than half a day, so not a connection we count.