5X 610 then CV 51 at O'Hare
Philadelphia → Chicago → Luxembourg
Timetable, Chicago time
04:215X 610 from Philadelphia at the gate
03:30CV 51 to Luxembourg leaves the gate
23 h 09 apart on the timetable, overnight
CV 51 leaves 23 h 09 after 5X 610 arrives on the timetable: more than half a day, so not a connection we count.