UA 506 then AA 1732 at San Francisco
Raleigh-Durham → San Francisco → Philadelphia
Timetable, San Francisco time
11:19UA 506 from Raleigh-Durham at the gate
09:46AA 1732 to Philadelphia leaves the gatealso BA 5616
22 h 27 apart on the timetable, overnight
AA 1732 leaves 22 h 27 after UA 506 arrives on the timetable: more than half a day, so not a connection we count.