F9 3511 then DL 472 at Atlanta
Boston → Atlanta → Seattle
Timetable, Atlanta time
16:00F9 3511 from Boston at the gate
14:05DL 472 to Seattle leaves the gate
22 h 05 apart on the timetable, overnight
DL 472 leaves 22 h 05 after F9 3511 arrives on the timetable: more than half a day, so not a connection we count.