AA 3820 then AA 6238 at DFW
Sioux Falls → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
20:23AA 3820 from Sioux Falls at the gate
08:25AA 6238 to Amarillo leaves the gate
12 h 02 apart on the timetable, overnight
AA 6238 leaves 12 h 02 after AA 3820 arrives on the timetable: more than half a day, so not a connection we count.