DL 1199 then CV 12 at O'Hare
Atlanta → Chicago → Luxembourg
Timetable, Chicago time
23:54DL 1199 from Atlanta at the gate
21:56CV 12 to Luxembourg leaves the gate
22 h 02 apart on the timetable, overnight
CV 12 leaves 22 h 02 after DL 1199 arrives on the timetable: more than half a day, so not a connection we count.