UA 4592 then CV 6426 at O'Hare
Omaha → Chicago → Luxembourg
Timetable, Chicago time
20:36UA 4592 from Omaha at the gate
19:30CV 6426 to Luxembourg leaves the gate
22 h 54 apart on the timetable, overnight
CV 6426 leaves 22 h 54 after UA 4592 arrives on the timetable: more than half a day, so not a connection we count.