AA 4311 then AA 6238 at DFW
Springfield → Dallas-Fort Worth → Amarillo
Timetable, Dallas-Fort Worth time
20:22AA 4311 from Springfield at the gate
08:25AA 6238 to Amarillo leaves the gate
12 h 03 apart on the timetable, overnight
AA 6238 leaves 12 h 03 after AA 4311 arrives on the timetable: more than half a day, so not a connection we count.