UA 324 then CV 12 at O'Hare
Atlanta → Chicago → Luxembourg
Timetable, Chicago time
18:59UA 324 from Atlanta at the gate
14:55CV 12 to Luxembourg leaves the gate
19 h 56 apart on the timetable, overnight
CV 12 leaves 19 h 56 after UA 324 arrives on the timetable: more than half a day, so not a connection we count.