KTO identifies four major Seoul coach terminals: Seoul Express Bus Terminal, Central City, Seoul Nambu and Dong Seoul. The first two share the Express Bus Terminal subway area but serve different routes; Seoul Nambu is near Nambu Terminal Station (Line 3), and Dong Seoul near Gangbyeon Station (Line 2). Always follow the terminal printed on your actual ticket.
Verify tickets, departures and operating changes with the booking operator before traveling.