WN 646 then AA 1870 at Miami
Nashville → Miami → San Juan
Timetable, Miami time
14:35WN 646 from Nashville at the gate
14:23AA 1870 to San Juan leaves the gate
23 h 48 apart on the timetable, overnight
AA 1870 leaves 23 h 48 after WN 646 arrives on the timetable: more than half a day, so not a connection we count.