UA 2747 then CV 32 at O'Hare
Buffalo → Chicago → Luxembourg
Timetable, Chicago time
19:02UA 2747 from Buffalo at the gate
18:40CV 32 to Luxembourg leaves the gate
23 h 38 apart on the timetable, overnight
CV 32 leaves 23 h 38 after UA 2747 arrives on the timetable: more than half a day, so not a connection we count.