AA 4001 then DL 2570 at O'Hare
Minneapolis → Chicago → Boston
Timetable, Chicago time
10:36AA 4001 from Minneapolis at the gate
10:35DL 2570 to Boston leaves the gate
23 h 59 apart on the timetable, overnight
DL 2570 leaves 23 h 59 after AA 4001 arrives on the timetable: more than half a day, so not a connection we count.