UA 2865 then CV 69 at O'Hare
Denver → Chicago → Luxembourg
Timetable, Chicago time
14:55UA 2865 from Denver at the gate
04:00CV 69 to Luxembourg leaves the gate
13 h 05 apart on the timetable, overnight
CV 69 leaves 13 h 05 after UA 2865 arrives on the timetable: more than half a day, so not a connection we count.