UA 5708 then CV 69 at O'Hare
Washington National → Chicago → Luxembourg
Timetable, Chicago time
15:40UA 5708 from Washington National at the gate
04:00CV 69 to Luxembourg leaves the gate
12 h 20 apart on the timetable, overnight
CV 69 leaves 12 h 20 after UA 5708 arrives on the timetable: more than half a day, so not a connection we count.