UA 2005 then DL 2646 at O'Hare
Pensacola → Chicago → Boston
Timetable, Chicago time
17:02UA 2005 from Pensacola at the gate
16:40DL 2646 to Boston leaves the gate
23 h 38 apart on the timetable, overnight
DL 2646 leaves 23 h 38 after UA 2005 arrives on the timetable: more than half a day, so not a connection we count.