UA 1341 then UA 5480 at San Francisco
Detroit → San Francisco → Arcata
Timetable, San Francisco time
19:31UA 1341 from Detroit at the gatealso OZ 9538
16:20UA 5480 to Arcata leaves the gatealso NZ 9319
20 h 49 apart on the timetable, overnight
UA 5480 leaves 20 h 49 after UA 1341 arrives on the timetable: more than half a day, so not a connection we count.