AS 373 then DL 438 at Seattle
Newark → Seattle → Boston
Timetable, Seattle time
12:47AS 373 from Newark at the gate
11:45DL 438 to Boston leaves the gate
22 h 58 apart on the timetable, overnight
DL 438 leaves 22 h 58 after AS 373 arrives on the timetable: more than half a day, so not a connection we count.