UA 751 then KQ 7281 at San Francisco
Portland (Oregon) → San Francisco → New York JFK
Timetable, San Francisco time
15:15UA 751 from Portland (Oregon) at the gatealso CM 1419, AC 3338, VA 8585, NZ 9358
12:24KQ 7281 to New York JFK leaves the gate
21 h 09 apart on the timetable, overnight
KQ 7281 leaves 21 h 09 after UA 751 arrives on the timetable: more than half a day, so not a connection we count.