AA 4258 then F9 1051 at DFW
Amarillo → Dallas-Fort Worth → Las Vegas
Timetable, Dallas-Fort Worth time
08:46AA 4258 from Amarillo at the gate
08:30F9 1051 to Las Vegas leaves the gate
23 h 44 apart on the timetable, overnight
F9 1051 leaves 23 h 44 after AA 4258 arrives on the timetable: more than half a day, so not a connection we count.