AA 3687 then AA 6238 at DFW
Montrose → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
16:22AA 3687 from Montrose at the gate
08:25AA 6238 to Amarillo leaves the gate
16 h 03 apart on the timetable, overnight
AA 6238 leaves 16 h 03 after AA 3687 arrives on the timetable: more than half a day, so not a connection we count.