UA 217 then UA 3906 at San Francisco
Arcata → San Francisco → Newark
Timetable, San Francisco time
09:13UA 217 from Arcata at the gate
07:00UA 3906 to Newark leaves the gate
21 h 47 apart on the timetable, overnight
UA 3906 leaves 21 h 47 after UA 217 arrives on the timetable: more than half a day, so not a connection we count.