AA 4257 then AA 1974 at DFW
Amarillo → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
06:20AA 4257 from Amarillo at the gate
06:12AA 1974 to Chicago O'Hare leaves the gate
23 h 52 apart on the timetable, overnight
AA 1974 leaves 23 h 52 after AA 4257 arrives on the timetable: more than half a day, so not a connection we count.