AS 436 then AS 257 at Boston
Portland (Oregon) → Boston → Seattle
Timetable, Boston time
06:12AS 436 from Portland (Oregon) at the gate
18:20AS 257 to Seattle leaves the gate
12 h 08 apart on the timetable
AS 257 leaves 12 h 08 after AS 436 arrives on the timetable: more than half a day, so not a connection we count.