UA 5599 then CA 7407 at San Francisco
Carlsbad → San Francisco → Austin
Timetable, San Francisco time
15:30UA 5599 from Carlsbad at the gate
12:06CA 7407 to Austin leaves the gate
20 h 36 apart on the timetable, overnight
CA 7407 leaves 20 h 36 after UA 5599 arrives on the timetable: more than half a day, so not a connection we count.