<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by travelaround:
Hello all,
Not sure if I've posted these questions to the right forum.
Can anyone please educate me why all the flights need to stay at either 30000ft or 33000ft? Would it fly faster at that altitude or for security reason?
Also, why does it require to open up all the windows when landing?
Thank you!!</font>
Well, all the flights don't fly at that altitude. Some fly higher, some lower. But that general range is pretty much the optimum operating altitude for jets to get a good combinates of true air speed and good fuel burn.
Other factors are traffic, weather, and wind.