UA 506 then B6 316 at San Francisco
Raleigh-Durham → San Francisco → New York JFK
Timetable, San Francisco time
11:19UA 506 from Raleigh-Durham at the gate
08:05B6 316 to New York JFK leaves the gatealso LO 5774, EY 8328, AT 9559
20 h 46 apart on the timetable, overnight
B6 316 leaves 20 h 46 after UA 506 arrives on the timetable: more than half a day, so not a connection we count.