AC 4533 then UA 5508 at San Francisco
Sacramento → San Francisco → Carlsbad
Timetable, San Francisco time
21:41AC 4533 from Sacramento at the gate
18:45UA 5508 to Carlsbad leaves the gate
21 h 04 apart on the timetable, overnight
UA 5508 leaves 21 h 04 after AC 4533 arrives on the timetable: more than half a day, so not a connection we count.