DL 816 then UA 2229 at Boston
Charlotte → Boston → Chicago O'Hare
Timetable, Boston time
21:28DL 816 from Charlotte at the gate
20:25UA 2229 to Chicago O'Hare leaves the gate
22 h 57 apart on the timetable, overnight
UA 2229 leaves 22 h 57 after DL 816 arrives on the timetable: more than half a day, so not a connection we count.