Incheon International Airport's official transport page distinguishes four Seoul-bound night services: N6000 toward Gangnam Express Bus Terminal, N6002 toward Cheongnyangni, N6701 toward Dongdaemun Design Plaza and N6703 toward Gwangnaru Station. First check your arrival terminal, then select a stop near your accommodation. Departure times may differ between Terminal 1 and Terminal 2. Allow time for immigration and baggage collection; verify current departures, boarding locations and fares with the airport and operators.