To aboard the ship, the cost is 1,200z except if you are switching from one airship to another.
You can take this Airship from:
1) West end of Yuno
2) East end of Hugel
3) West end of Einbroch
4) Southeast corner of Lighthalzen
The destinations for Airship 2 are Yuno, Hugel, Einbroch and Lighthalzen.
Inside the Yuno Airship Terminal, you have a choice to take Airship 1 (above) or Airship 2 (this one). The NPC on the left will send you to the staircase to Airship 1 while the NPC on the right will send you to the staircase leading to Airship 2. In either cases, just walk up the stairs and take the ship.
If you got off from Airship 1, then go downstair into the terminal, talk to the Airport Staff on the right to take the Airship 2.
Warning: At times, the airship may be invaded by unidentified flying species. To avoid dying on the airship during the invasion, you can go inside to the cabins on the ship.