DL 921 then AA 1728 at DFW
Atlanta → Dallas-Fort Worth → Cincinnati
Timetable, Dallas-Fort Worth time
15:20DL 921 from Atlanta at the gate
15:13AA 1728 to Cincinnati leaves the gate
23 h 53 apart on the timetable, overnight
AA 1728 leaves 23 h 53 after DL 921 arrives on the timetable: more than half a day, so not a connection we count.