DL 870 then DL 961 at DFW
Seattle → Dallas-Fort Worth → Atlanta
Timetable, Dallas-Fort Worth time
23:53DL 870 from Seattle at the gate
12:23DL 961 to Atlanta leaves the gate
12 h 30 apart on the timetable, overnight
DL 961 leaves 12 h 30 after DL 870 arrives on the timetable: more than half a day, so not a connection we count.