UA 5500 then CV 69 at O'Hare
Green Bay → Chicago → Luxembourg
Timetable, Chicago time
15:30UA 5500 from Green Bay 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 5500 arrives on the timetable: more than half a day, so not a connection we count.