AA 644 then AA 1422 at Phoenix
Tampa → Phoenix → Boston
Timetable, Phoenix time
20:50AA 644 from Tampa at the gate
16:52AA 1422 to Boston leaves the gate
20 h 02 apart on the timetable, overnight
AA 1422 leaves 20 h 02 after AA 644 arrives on the timetable: more than half a day, so not a connection we count.