AA 6309 then UA 3917 at Houston
Los Angeles → Houston → Austin
Timetable, Houston time
14:49AA 6309 from Los Angeles at the gate
07:30UA 3917 to Austin leaves the gate
16 h 41 apart on the timetable, overnight
UA 3917 leaves 16 h 41 after AA 6309 arrives on the timetable: more than half a day, so not a connection we count.