AS 288 then B6 1187 at Boston
Seattle → Boston → Los Angeles
Timetable, Boston time
15:55AS 288 from Seattle at the gate
15:45B6 1187 to Los Angeles leaves the gate
23 h 50 apart on the timetable, overnight
B6 1187 leaves 23 h 50 after AS 288 arrives on the timetable: more than half a day, so not a connection we count.