DL 854 then AA 2398 at Atlanta
Springfield → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
18:14DL 854 from Springfield at the gate
17:30AA 2398 to Dallas-Fort Worth leaves the gate
23 h 16 apart on the timetable, overnight
AA 2398 leaves 23 h 16 after DL 854 arrives on the timetable: more than half a day, so not a connection we count.