UA 1970 then UA 5480 at San Francisco
Cleveland → San Francisco → Arcata
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
16:20UA 5480 to Arcata leaves the gatealso NZ 9319
18 h 35 apart on the timetable, overnight
UA 5480 leaves 18 h 35 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.