F9 2072 then B6 1860 at Philadelphia
Raleigh-Durham → Philadelphia → Boston
Timetable, Philadelphia time
16:24F9 2072 from Raleigh-Durham at the gate
15:35B6 1860 to Boston leaves the gate
23 h 11 apart on the timetable, overnight
B6 1860 leaves 23 h 11 after F9 2072 arrives on the timetable: more than half a day, so not a connection we count.