What is the cruising altitude of airbus a319?

I've been looking a lot too, and I have found no results, however I know that the very similar model the a320 has a typical cruising altitude for long haul flights of FL390. (39,000 feet)

Since the a319 is very similar but smaller, I would suggest around FL360 for a typical cruising altitude, but I am not a professional.

The cruising altitude also heavily depends on the length of the flight. If it is a shorter flight, the lower recommended cruising altitude etc.

And the temperature and weather is also a contributing factor, but FL360 would be a safe bet as to the a319's typical cruising altitude.

Hope I could help.