Question: azsuna how to get there?
Answer: Accept quest, take the free flight with Khadgar.
Go to nearby flight master & obtain flight path.
Fly (or hearth) to Dalaran.
Abandon & accept quest, but DO NOT fly with Khadgar. ... 
Khadgar will be waiting with the next quest in the chain. ... 
Abandon the quest you now have, and start from the beginning.