AA 2738 then DL 2570 at O'Hare
Fort Lauderdale → Chicago → Boston
Timetable, Chicago time
11:05AA 2738 from Fort Lauderdale at the gate
11:00DL 2570 to Boston leaves the gate
23 h 55 apart on the timetable, overnight
DL 2570 leaves 23 h 55 after AA 2738 arrives on the timetable: more than half a day, so not a connection we count.