DL 420 then UA 3906 at San Francisco
Santa Ana → San Francisco → Newark
Timetable, San Francisco time
09:56DL 420 from Santa Ana at the gate
07:00UA 3906 to Newark leaves the gate
21 h 04 apart on the timetable, overnight
UA 3906 leaves 21 h 04 after DL 420 arrives on the timetable: more than half a day, so not a connection we count.