UA 5332 then CV 12 at O'Hare
St Louis → Chicago → Luxembourg
Timetable, Chicago time
16:49UA 5332 from St Louis at the gate
14:55CV 12 to Luxembourg leaves the gate
22 h 06 apart on the timetable, overnight
CV 12 leaves 22 h 06 after UA 5332 arrives on the timetable: more than half a day, so not a connection we count.