AA 6448 then AA 2312 at DFW
South Bend → Dallas-Fort Worth → Tulsa
Timetable, Dallas-Fort Worth time
19:53AA 6448 from South Bend at the gate
18:11AA 2312 to Tulsa leaves the gate
22 h 18 apart on the timetable, overnight
AA 2312 leaves 22 h 18 after AA 6448 arrives on the timetable: more than half a day, so not a connection we count.