WN 3402 then AA 552 at Atlanta
St Louis → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
19:20WN 3402 from St Louis at the gate
17:07AA 552 to Dallas-Fort Worth leaves the gate
21 h 47 apart on the timetable, overnight
AA 552 leaves 21 h 47 after WN 3402 arrives on the timetable: more than half a day, so not a connection we count.