UA 451 then WN 3389 at Phoenix
San Diego → Phoenix → Austin
Timetable, Phoenix time
23:59UA 451 from San Diego at the gate
13:35WN 3389 to Austin leaves the gate
13 h 36 apart on the timetable, overnight
WN 3389 leaves 13 h 36 after UA 451 arrives on the timetable: more than half a day, so not a connection we count.