UA 2818 then B6 316 at San Francisco
Portland (Oregon) → San Francisco → New York JFK
Timetable, San Francisco time
09:08UA 2818 from Portland (Oregon) at the gatealso AC 3341, AZ 4374, VA 8459, NZ 9357
08:05B6 316 to New York JFK leaves the gatealso LO 5774, EY 8328, AT 9559
22 h 57 apart on the timetable, overnight
B6 316 leaves 22 h 57 after UA 2818 arrives on the timetable: more than half a day, so not a connection we count.