UA 3905 then AA 2553 at San Francisco
Tokyo Haneda → San Francisco → Philadelphia
Timetable, San Francisco time
16:33UA 3905 from Tokyo Haneda at the gate
08:30AA 2553 to Philadelphia leaves the gatealso BA 5617
15 h 57 apart on the timetable, overnight
AA 2553 leaves 15 h 57 after UA 3905 arrives on the timetable: more than half a day, so not a connection we count.