DL 1967 then B6 2255 at Boston
New Orleans → Boston → Washington National
Timetable, Boston time
18:54DL 1967 from New Orleans at the gate
18:20B6 2255 to Washington National leaves the gate
23 h 26 apart on the timetable, overnight
B6 2255 leaves 23 h 26 after DL 1967 arrives on the timetable: more than half a day, so not a connection we count.