Y4 2770 then AC 4187 at San Francisco
Las Vegas → San Francisco → Santa Ana
Timetable, San Francisco time
14:20Y4 2770 from Las Vegas at the gatealso F9 4401
13:45AC 4187 to Santa Ana leaves the gatealso VA 8491
23 h 25 apart on the timetable, overnight
AC 4187 leaves 23 h 25 after Y4 2770 arrives on the timetable: more than half a day, so not a connection we count.