The Bundang Subway Line stops in all the major areas of Bundang, and is very convient.
Many buses run between all the different areas of Bundang. Buses are the best way to get back and forth between Bundang and Seoul, even during rush hour 8pm a bus can get from Bundang to Insadong in 40 minutes. This trip will cost about 1,700 wan.
Taxis
can be used, but they are not as ubiquitous as in Seoul. During commute times it is near impossible to find a free taxi. At night, however, there should be no problem. Ask about your destination before you get in, as some taxis will only take you to certain areas for example, some taxis are only for trips to Seoul, and cannot take you around Bundang Most local taxis will not run the meter to Seoul and will ask for 30-40k wan for the trip.