UA 4781 then CV 26 at O'Hare
Washington National → Chicago → Luxembourg
Timetable, Chicago time
20:39UA 4781 from Washington National at the gate
15:05CV 26 to Luxembourg leaves the gate
18 h 26 apart on the timetable, overnight
CV 26 leaves 18 h 26 after UA 4781 arrives on the timetable: more than half a day, so not a connection we count.