AS 3038 then DL 438 at Seattle
Portland (Oregon) → Seattle → Boston
Timetable, Seattle time
13:08AS 3038 from Portland (Oregon) at the gate
11:45DL 438 to Boston leaves the gate
22 h 37 apart on the timetable, overnight
DL 438 leaves 22 h 37 after AS 3038 arrives on the timetable: more than half a day, so not a connection we count.