AA 2999 then CV 12 at O'Hare
Dallas-Fort Worth → Chicago → Luxembourg
Timetable, Chicago time
10:05AA 2999 from Dallas-Fort Worth at the gate
03:46CV 12 to Luxembourg leaves the gate
17 h 41 apart on the timetable, overnight
CV 12 leaves 17 h 41 after AA 2999 arrives on the timetable: more than half a day, so not a connection we count.