AA 1573 then CV 21 at O'Hare
Dallas-Fort Worth → Chicago → Luxembourg
Timetable, Chicago time
20:38AA 1573 from Dallas-Fort Worth at the gate
16:50CV 21 to Luxembourg leaves the gate
20 h 12 apart on the timetable, overnight
CV 21 leaves 20 h 12 after AA 1573 arrives on the timetable: more than half a day, so not a connection we count.