UA 697 then UA 3917 at Houston
Washington National → Houston → Austin
Timetable, Houston time
10:54UA 697 from Washington National at the gate
07:30UA 3917 to Austin leaves the gate
20 h 36 apart on the timetable, overnight
UA 3917 leaves 20 h 36 after UA 697 arrives on the timetable: more than half a day, so not a connection we count.