OS 472 then ET 731 at Vienna
Gran Canaria → Vienna → Addis Ababa
Timetable, Vienna time
22:10OS 472 from Gran Canaria at the gate
22:00ET 731 to Addis Ababa leaves the gate
23 h 50 apart on the timetable, overnight
ET 731 leaves 23 h 50 after OS 472 arrives on the timetable: more than half a day, so not a connection we count.