AA 6195 then AA 3646 at O'Hare
Nashville → Chicago → Tulsa
Timetable, Chicago time
07:15AA 6195 from Nashville at the gate
19:45AA 3646 to Tulsa leaves the gate
12 h 30 apart on the timetable
AA 3646 leaves 12 h 30 after AA 6195 arrives on the timetable: more than half a day, so not a connection we count.