DL 9964 then DL 472 at Atlanta
Grand Rapids → Atlanta → Seattle
Timetable, Atlanta time
18:19DL 9964 from Grand Rapids at the gate
14:05DL 472 to Seattle leaves the gate
19 h 46 apart on the timetable, overnight
DL 472 leaves 19 h 46 after DL 9964 arrives on the timetable: more than half a day, so not a connection we count.