AA 4337 then CV 278 at O'Hare
Indianapolis → Chicago → Luxembourg
Timetable, Chicago time
11:53AA 4337 from Indianapolis at the gate
01:20CV 278 to Luxembourg leaves the gate
13 h 27 apart on the timetable, overnight
CV 278 leaves 13 h 27 after AA 4337 arrives on the timetable: more than half a day, so not a connection we count.