When you get the airship pass it tells you that you need to go to all 3 cities after that you get a quest to go to the adventures guild in limsa so that you will unlock the lvl 15 dungeon sastasha.
So you must have missed something. Where are you at the moment?
Edited, Sep 1st 2013 3:25pm by Teravibe
YaY signature!! (i was never good with signatures >_<)
Grim Reaperz (Ultros server)