UA 3926 then AC 5484 at San Francisco
Newark → San Francisco → Austin
Timetable, San Francisco time
22:56UA 3926 from Newark at the gate
17:20AC 5484 to Austin leaves the gate
18 h 24 apart on the timetable, overnight
AC 5484 leaves 18 h 24 after UA 3926 arrives on the timetable: more than half a day, so not a connection we count.