AA 2238 then AA 2312 at DFW
Nashville → Dallas-Fort Worth → Tulsa
Timetable, Dallas-Fort Worth time
21:50AA 2238 from Nashville at the gate
18:11AA 2312 to Tulsa leaves the gate
20 h 21 apart on the timetable, overnight
AA 2312 leaves 20 h 21 after AA 2238 arrives on the timetable: more than half a day, so not a connection we count.