Translation:At what hour is the flight?
At what time is the flight. In Portuguese there is a similar usage but it means time in English.
What time is the flight , would be natural English.
a zbura < Latin ex + volare = wish out, related to English volition
but more famously to flying as in https://www.youtube.com/watch?v=6WdyyLC4Xgs
... didn't see that one coming in the Romanian word :-)