AA 3983 then AA 6238 at DFW
Laredo → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
12:15AA 3983 from Laredo at the gate
08:25AA 6238 to Amarillo leaves the gate
20 h 10 apart on the timetable, overnight
AA 6238 leaves 20 h 10 after AA 3983 arrives on the timetable: more than half a day, so not a connection we count.