Y4 700 then CV 51 at O'Hare
Mexico City → Chicago → Luxembourg
Timetable, Chicago time
04:43Y4 700 from Mexico City at the gate
04:10CV 51 to Luxembourg leaves the gate
23 h 27 apart on the timetable, overnight
CV 51 leaves 23 h 27 after Y4 700 arrives on the timetable: more than half a day, so not a connection we count.