UA 462 then UA 3917 at Houston
Portland (Oregon) → Houston → Austin
Timetable, Houston time
13:12UA 462 from Portland (Oregon) at the gate
07:30UA 3917 to Austin leaves the gate
18 h 18 apart on the timetable, overnight
UA 3917 leaves 18 h 18 after UA 462 arrives on the timetable: more than half a day, so not a connection we count.