UA 658 then DL 2646 at O'Hare
Minneapolis → Chicago → Boston
Timetable, Chicago time
18:29UA 658 from Minneapolis at the gate
16:40DL 2646 to Boston leaves the gate
22 h 11 apart on the timetable, overnight
DL 2646 leaves 22 h 11 after UA 658 arrives on the timetable: more than half a day, so not a connection we count.