UA 1786 then CV 12 at O'Hare
Washington → Chicago → Luxembourg
Timetable, Chicago time
17:00UA 1786 from Washington at the gate
14:55CV 12 to Luxembourg leaves the gate
21 h 55 apart on the timetable, overnight
CV 12 leaves 21 h 55 after UA 1786 arrives on the timetable: more than half a day, so not a connection we count.