DL 384 then DL 560 at Seattle
Boston → Seattle → Atlanta
Timetable, Seattle time
11:17DL 384 from Boston at the gate
23:35DL 560 to Atlanta leaves the gate
12 h 18 apart on the timetable
DL 560 leaves 12 h 18 after DL 384 arrives on the timetable: more than half a day, so not a connection we count.