UA 5596 then OZ 6315 at San Francisco
Monterrey → San Francisco → Washington
Timetable, San Francisco time
08:26UA 5596 from Monterrey at the gate
21:28OZ 6315 to Washington leaves the gate
13 h 02 apart on the timetable
OZ 6315 leaves 13 h 02 after UA 5596 arrives on the timetable: more than half a day, so not a connection we count.