AS 2152 then DL 438 at Seattle
Pullman → Seattle → Boston
Timetable, Seattle time
12:57AS 2152 from Pullman at the gate
11:45DL 438 to Boston leaves the gate
22 h 48 apart on the timetable, overnight
DL 438 leaves 22 h 48 after AS 2152 arrives on the timetable: more than half a day, so not a connection we count.