UA 4171 then CV 69 at O'Hare
Birmingham (Alabama) → Chicago → Luxembourg
Timetable, Chicago time
15:30UA 4171 from Birmingham (Alabama) at the gate
04:00CV 69 to Luxembourg leaves the gate
12 h 30 apart on the timetable, overnight
CV 69 leaves 12 h 30 after UA 4171 arrives on the timetable: more than half a day, so not a connection we count.