OS 46 then FR 45 at Vienna
Chicago → Vienna → Athens
Timetable, Vienna time
08:05OS 46 from Chicago at the gate
07:50FR 45 to Athens leaves the gate
23 h 45 apart on the timetable, overnight
FR 45 leaves 23 h 45 after OS 46 arrives on the timetable: more than half a day, so not a connection we count.