AA 1978 then AA 6238 at DFW
Washington National → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
11:13AA 1978 from Washington National at the gate
08:25AA 6238 to Amarillo leaves the gate
21 h 12 apart on the timetable, overnight
AA 6238 leaves 21 h 12 after AA 1978 arrives on the timetable: more than half a day, so not a connection we count.