AS 279 then DL 5665 at Boston
Seattle → Boston → Richmond
Timetable, Boston time
17:17AS 279 from Seattle at the gate
15:20DL 5665 to Richmond leaves the gate
22 h 03 apart on the timetable, overnight
DL 5665 leaves 22 h 03 after AS 279 arrives on the timetable: more than half a day, so not a connection we count.