AA 305 then AA 6238 at DFW
Key West → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
16:46AA 305 from Key West at the gate
08:25AA 6238 to Amarillo leaves the gate
15 h 39 apart on the timetable, overnight
AA 6238 leaves 15 h 39 after AA 305 arrives on the timetable: more than half a day, so not a connection we count.