UA 488 then OZ 6315 at San Francisco
Burbank → San Francisco → Washington
Timetable, San Francisco time
09:09UA 488 from Burbank at the gatealso AC 4195
21:28OZ 6315 to Washington leaves the gate
12 h 19 apart on the timetable
OZ 6315 leaves 12 h 19 after UA 488 arrives on the timetable: more than half a day, so not a connection we count.