UA 2279 then DL 4631 at San Francisco
Reno → San Francisco → Santa Ana
Timetable, San Francisco time
15:35UA 2279 from Reno at the gatealso CM 2540, AC 4597, NZ 9580
15:05DL 4631 to Santa Ana leaves the gate
23 h 30 apart on the timetable, overnight
DL 4631 leaves 23 h 30 after UA 2279 arrives on the timetable: more than half a day, so not a connection we count.