AA 820 then AA 6238 at DFW
Atlanta → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
12:49AA 820 from Atlanta at the gate
08:25AA 6238 to Amarillo leaves the gate
19 h 36 apart on the timetable, overnight
AA 6238 leaves 19 h 36 after AA 820 arrives on the timetable: more than half a day, so not a connection we count.