AA 1254 then AA 3449 at DFW
Nashville → Dallas-Fort Worth → Tallahassee
Timetable, Dallas-Fort Worth time
12:34AA 1254 from Nashville at the gate
12:19AA 3449 to Tallahassee leaves the gate
23 h 45 apart on the timetable, overnight
AA 3449 leaves 23 h 45 after AA 1254 arrives on the timetable: more than half a day, so not a connection we count.