security checkpoints Done.
It needs to have a control tower Done.
It needs to have one runway per connection ( a runway is at least 5 blocks wide and 25 blocks long) 2 Runways.
It needs to have a terminal ( this needs to be a big building) Done.
It has to look realistic Done.
The surface area of the international airport has to be at least 2000 blocks Is 15295 blocks.
An international airport will only be available to cities that have already passed Tier 4 in the City Tier system. Avara City is tier 4.
35k will be available tomorrow.
Pictures:
