UA 2243 then CV 12 at O'Hare
Toronto Pearson → Chicago → Luxembourg
Timetable, Chicago time
19:05UA 2243 from Toronto Pearson at the gate
14:55CV 12 to Luxembourg leaves the gate
19 h 50 apart on the timetable, overnight
CV 12 leaves 19 h 50 after UA 2243 arrives on the timetable: more than half a day, so not a connection we count.