UA 2258 then CV 26 at O'Hare
Denver → Chicago → Luxembourg
Timetable, Chicago time
22:46UA 2258 from Denver at the gate
15:05CV 26 to Luxembourg leaves the gate
16 h 19 apart on the timetable, overnight
CV 26 leaves 16 h 19 after UA 2258 arrives on the timetable: more than half a day, so not a connection we count.