UA 3851 then AC 5484 at San Francisco
Rio De Janeiro → San Francisco → Austin
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
17:20AC 5484 to Austin leaves the gate
23 h 39 apart on the timetable, overnight
AC 5484 leaves 23 h 39 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.