This post tells you the ways to travel from Incheon Airport to Seoul by AREX(train), airport buses, and taxis. You can get information about its fare and timetable also.
Let's see what is the best way to get to Myeongdong from Incheon Airport. There're three different ways, AREX(Airport Railroad), airport buses and a taxi.
Let's see what is the best way to Hongik University Station from Incheon Airport/Gimpo Airport. There're three different ways by AREX(Airport Railroad), Airport Limousine Bus and Taxi.