sylph got them dead....
and how the telaports work is, you have to do a refulling misson to an out post and then when the outpost is under your controle the guy the sells things to you can warp you back to your home country, and you can warp to the outpost from your home country.

on my sever you have to be lvl 20 and it cost like 200 gil to warp from san to the dunes when its under its controle and when its not under san contole is 800 gil.