AA 3911 then UA 3917 at Houston
Dallas-Fort Worth → Houston → Austin
Timetable, Houston time
13:31AA 3911 from Dallas-Fort Worth at the gate
07:30UA 3917 to Austin leaves the gate
17 h 59 apart on the timetable, overnight
UA 3917 leaves 17 h 59 after AA 3911 arrives on the timetable: more than half a day, so not a connection we count.