QF 4339 then UA 785 at San Francisco
New York JFK → San Francisco → Washington
Timetable, San Francisco time
14:31QF 4339 from New York JFK at the gatealso G3 6199, QR 9238
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
15 h 44 apart on the timetable, overnight
UA 785 leaves 15 h 44 after QF 4339 arrives on the timetable: more than half a day, so not a connection we count.