UA 3772 then QR 2125 at San Francisco
Las Vegas → San Francisco → Santa Ana
Timetable, San Francisco time
22:05UA 3772 from Las Vegas at the gate
17:49QR 2125 to Santa Ana leaves the gatealso AS 2407, BA 7599
19 h 44 apart on the timetable, overnight
QR 2125 leaves 19 h 44 after UA 3772 arrives on the timetable: more than half a day, so not a connection we count.