AA 2348 then WN 2731 at Charlotte
Portland (Maine) → Charlotte → Nashville
Timetable, Charlotte time
08:25AA 2348 from Portland (Maine) at the gate
20:55WN 2731 to Nashville leaves the gate
12 h 30 apart on the timetable
WN 2731 leaves 12 h 30 after AA 2348 arrives on the timetable: more than half a day, so not a connection we count.