UA 368 then OZ 6315 at San Francisco
Washington National → San Francisco → Washington
Timetable, San Francisco time
21:00UA 368 from Washington National at the gatealso NZ 2770
16:52OZ 6315 to Washington leaves the gate
19 h 52 apart on the timetable, overnight
OZ 6315 leaves 19 h 52 after UA 368 arrives on the timetable: more than half a day, so not a connection we count.