AS 390 then DL 508 at Boston
San Diego → Boston → Los Angeles
Timetable, Boston time
16:41AS 390 from San Diego at the gate
16:15DL 508 to Los Angeles leaves the gate
23 h 34 apart on the timetable, overnight
DL 508 leaves 23 h 34 after AS 390 arrives on the timetable: more than half a day, so not a connection we count.