UA 5503 then UA 481 at San Francisco
Portland (Oregon) → San Francisco → Raleigh-Durham
Timetable, San Francisco time
07:28UA 5503 from Portland (Oregon) at the gate
07:25UA 481 to Raleigh-Durham leaves the gate
23 h 57 apart on the timetable, overnight
UA 481 leaves 23 h 57 after UA 5503 arrives on the timetable: more than half a day, so not a connection we count.