AA 2359 then AA 6238 at DFW
Denver → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
16:24AA 2359 from Denver at the gate
08:25AA 6238 to Amarillo leaves the gate
16 h 01 apart on the timetable, overnight
AA 6238 leaves 16 h 01 after AA 2359 arrives on the timetable: more than half a day, so not a connection we count.