UA 3851 then CA 7407 at San Francisco
Rio De Janeiro → San Francisco → Austin
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
12:08CA 7407 to Austin leaves the gate
18 h 27 apart on the timetable, overnight
CA 7407 leaves 18 h 27 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.