Google Maps does not give driving or walking directions in South Korea. The most common software used by locals are Naver Map and KakaoMap.
Seoul’s public transportation smart card is known as T-money card. This can be used on many local buses and subways throughout the country and some taxis.
BUS: Buses (버스 beoseu) remain the main mode of national transport, connecting all cities and towns. The Korean Express Bus Lines Association have timetables and fares of the Express bus routes in South Korea on their website.
TRAIN: National train operator Korail (KR) connects major cities in South Korea. South Korea’s flagship service is the high speed Korea Train eXpress (KTX) with services from Seoul to Busan, Yeosu, Mokpo, Masan, and Gangneung (with new services opening all the time). >> High-speed rail in South Korea
AIRPORT: Incheon International Airport , about 1 hour west of Seoul, is the country’s largest airport and is served by many international airlines. Busan’s Gimhae International Airport • Jeju International Airport
WATERWAYS: The services listed here may change frequently, and English language websites may not be updated with the current information. Verify before traveling. Busan’s International Passenger Terminal (map) is the largest seaport in the country and offers ferry rides mostly to and from Japan. JR Beetle • New Camelia • Pukwan Ferry Company • Panstar Line.
Incheon’s International Ferry Terminal (map) has services from several cities in China, such as Weihai, Dandong, Qingdao and Tianjin. The largest operator is Jinchon, but Incheon Port has full listings on their website.