Unless you want to take the limo, you can take the subway. The fare is about 2000won but you need to transfer. If you have a lot of luggage, We don’t recommend it. Here’s the way. First, you should take the purple line at Airport station, and transfer to the green line bound for Jangsan at Sasang. Secondly, you should get off at Haeundae station. Lastly, you should get out of the Exit 5 and walk a little bit. Please, refer to the map below.