AS 482 then DL 438 at Seattle
Los Angeles → Seattle → Boston
Timetable, Seattle time
12:12AS 482 from Los Angeles at the gate
11:45DL 438 to Boston leaves the gate
23 h 33 apart on the timetable, overnight
DL 438 leaves 23 h 33 after AS 482 arrives on the timetable: more than half a day, so not a connection we count.