AA 420 then AA 6238 at DFW
Denver → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
18:18AA 420 from Denver at the gate
08:25AA 6238 to Amarillo leaves the gate
14 h 07 apart on the timetable, overnight
AA 6238 leaves 14 h 07 after AA 420 arrives on the timetable: more than half a day, so not a connection we count.