UA 5892 then AA 2553 at San Francisco
Monterey → San Francisco → Philadelphia
Timetable, San Francisco time
11:01UA 5892 from Monterey at the gate
09:00AA 2553 to Philadelphia leaves the gatealso BA 5617
21 h 59 apart on the timetable, overnight
AA 2553 leaves 21 h 59 after UA 5892 arrives on the timetable: more than half a day, so not a connection we count.