AA 5594 then AA 6238 at DFW
Lexington → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
20:00AA 5594 from Lexington at the gate
08:25AA 6238 to Amarillo leaves the gate
12 h 25 apart on the timetable, overnight
AA 6238 leaves 12 h 25 after AA 5594 arrives on the timetable: more than half a day, so not a connection we count.