AA 377 then DL 2646 at O'Hare
Raleigh-Durham → Chicago → Boston
Timetable, Chicago time
07:37AA 377 from Raleigh-Durham at the gate
19:45DL 2646 to Boston leaves the gate
12 h 08 apart on the timetable
DL 2646 leaves 12 h 08 after AA 377 arrives on the timetable: more than half a day, so not a connection we count.