Take the Express Subway from Incheon International Airport Station(인천국제공항) to Seoul Station(서울역). -Approximately 1 hour.
After, catch a taxi in front of the Seoul Tran Station, or take bus (No.501) to Soongsil University.
By Airport Limousines bus
Take an Airport Limousines bus (No.6019) From bus stop (13A Area) of Incheon International Airport-Cost: 15,000wons (one-way)By Call Van Service
It is much more convenient when moving as a group. The Jumbo Taxi can hold up to 5 passengers and the fare is a flat rate not based on per person. It will take approximately 90-95 minutes under normal traffic conditions. (Taxi stop at Incheon Airport / Fare: 90,000 KRW)Taxi
Once you clear customs, and exit the main terminal, go to taxi stop No.5C where there are taxies that will go to Seoul.
(Fare : approximately 70,000 KRW)