AA 2124 then DL 2646 at O'Hare
Indianapolis → Chicago → Boston
Timetable, Chicago time
06:01AA 2124 from Indianapolis at the gate
19:45DL 2646 to Boston leaves the gate
13 h 44 apart on the timetable
DL 2646 leaves 13 h 44 after AA 2124 arrives on the timetable: more than half a day, so not a connection we count.