CX 7854 then UA 2639 at San Francisco
Seattle → San Francisco → Arcata
Timetable, San Francisco time
20:47CX 7854 from Seattle at the gate
16:20UA 2639 to Arcata leaves the gatealso EK 6490
19 h 33 apart on the timetable, overnight
UA 2639 leaves 19 h 33 after CX 7854 arrives on the timetable: more than half a day, so not a connection we count.