DL 937 then DL 3161 at Atlanta
Tucson → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
20:35DL 937 from Tucson at the gate
20:25DL 3161 to Dallas-Fort Worth leaves the gate
23 h 50 apart on the timetable, overnight
DL 3161 leaves 23 h 50 after DL 937 arrives on the timetable: more than half a day, so not a connection we count.