South Korea operates one of the most technologically advanced and punctual domestic transport networks in Asia. The country measures approximately 100,000 square kilometers, and the transport infrastructure connects Seoul in the northwest to Busan on the southeast coast, a distance of roughly 325 kilometers by direct rail. The Ministry of Land, Infrastructure and Transport oversees the national transport policy, while operations are divided among Korea Railroad Corporation (KORAIL) for railways, multiple private operators for buses, and several regional authorities for metro systems. Population density averages 527 people per square kilometer, which has driven investment in high-capacity, high-frequency systems rather than road expansion.
The Korea Train eXpress (KTX) began operations on April 1, 2004, on the Gyeongbu Line connecting Seoul Station to Busan Station. The initial rolling stock consisted of French TGV Réseau trainsets manufactured by Alstom under technology transfer agreements. Journey time between Seoul and Busan decreased from four hours and ten minutes by conventional rail to two hours and eighteen minutes. The KTX network expanded to include the Honam Line to Gwangju and Mokpo in 2004, the Gyeongbu High Speed Line second phase in 2010, and the Jeolla Line extensions in 2011. As of 2023, the network comprises approximately 893 kilometers of dedicated high-speed track with maximum operating speeds of 305 kilometers per hour on certain sections.
KORAIL introduced domestically designed KTX-Sancheon trainsets in 2009, manufactured by Hyundai Rotem. These trains feature distributed traction systems rather than the concentrated power cars of the original TGV design, allowing greater flexibility in consist configuration. Each KTX-Sancheon trainset seats 363 passengers across ten cars. The KTX-Eun trainsets entered service in 2021, designed for operations at 260 kilometers per hour with improved energy efficiency. KORAIL operates approximately 168 KTX departures daily on the Gyeongbu Line between Seoul and Busan during peak periods. Trains depart Seoul Station every ten to fifteen minutes during morning and evening rush hours. Economy class tickets for Seoul to Busan range from 59,800 won to 64,500 won depending on demand-based pricing, while first class seats cost approximately 89,000 won.
The slower Saemaeul and Mugunghwa conventional trains continue to serve routes where high-speed infrastructure does not exist. Saemaeul trains reach maximum speeds of 150 kilometers per hour and connect Seoul to Andong in approximately three hours, covering 254 kilometers. The fare for this route is approximately 27,800 won in standard class. Mugunghwa trains, the basic intercity service, operate at maximum speeds of 120 kilometers per hour with stops at nearly every station along their routes. A Mugunghwa journey from Seoul to Jeonju covers 229 kilometers in approximately three hours and costs around 20,300 won. These conventional trains serve smaller cities including Sokcho in Gangwon Province, Pohang on the east coast, and numerous towns in the Jeolla provinces where ridership does not justify high-speed construction.
KORAIL instituted reserved seating on all KTX and Saemaeul services. Passengers must book specific train numbers and seat assignments, available through the KORAIL website, mobile application, station ticket offices, and automated kiosks. The reservation system opens 30 days before departure. During Korean holiday periods including Chuseok (harvest festival, typically late September or early October) and Seollal (Lunar New Year, typically late January or February), tickets sell out within minutes of becoming available. KORAIL adds extra trains called ImSi-yeolcha during these periods, sometimes increasing daily departures by forty percent. Standing-room tickets are not sold on KTX trains. Passengers without reservations may purchase tickets for Mugunghwa trains, which allocate approximately thirty percent of seats for unreserved boarding on a first-come basis.
Seoul Station functions as the primary railway hub, located in Jung District with connections to Seoul Metro Lines 1 and 4 and the Airport Railroad Express. The station building, designed by architect Eom Deok-mun, opened in 2004 and processes approximately 100,000 passengers daily. Platforms accommodate trains departing for Busan, Daejeon, Daegu, Gwangju, Mokpo, and Gangneung. Yongsan Station, located three kilometers south in Yongsan District, serves as an additional departure point for KTX trains to Gwangju and Mokpo, helping to distribute passenger loads during peak periods. Cheongnyangni Station in eastern Seoul handles departures to Gangneung on the east coast, a route that opened in December 2017 and reduced travel time from five hours to under two hours.
The Seoul Metropolitan Subway, which began operations on Line 1 in August 1974, has expanded to nine lines operated by Seoul Metro and three additional lines operated by other authorities. The network totals approximately 331 kilometers of route length with 300 stations within Seoul city boundaries. Lines extend into surrounding Gyeonggi Province, with the total metropolitan network reaching approximately 1,098 kilometers when including all connected services. Seoul Metro Lines 1 through 9 use standardized 1,435-millimeter standard gauge track. Daily ridership averages 7.7 million passengers across all lines. Single journey fares begin at 1,250 won for adults traveling up to ten kilometers, increasing by 100 won for each additional five kilometers. The T-money card, introduced in 2004, allows contactless payment with a discount of 150 won per journey compared to single-use tickets. The same T-money card functions on buses, taxis displaying the card reader, and convenience store purchases.
Busan Metro operates four numbered lines plus the Busan-Gimhae Light Rail Transit, totaling 142 kilometers with 114 stations. Line 1, which opened in 1985, runs 40.1 kilometers from Nopo to Sinpyeong with 34 stations. Line 2 forms a loop through central Busan, connecting Jangsan to Yangsan with 43 stations across 45.2 kilometers. Lines 3 and 4 serve outlying districts. Base fare is 1,400 won for adults using single-journey cards, reduced to 1,250 won with transit cards. Trains operate from approximately 5:30 AM until midnight, with headways of four to six minutes during peak hours. The Busan-Gimhae Light Rail Transit connects Sasang Station in Busan to Gimhae International Airport, covering 23.9 kilometers in 36 minutes with 21 stations. This line uses rubber-tired automatic guideway transit technology developed by Mitsubishi Heavy Industries.
Daegu Metro comprises three lines totaling 81.3 kilometers with 89 stations. Line 1 runs northwest to southeast for 32.2 kilometers, while Line 2 forms a circular route of 31.3 kilometers. Line 3, which opened in April 2015, operates as a monorail system using Hitachi-manufactured trains. The monorail runs 23.9 kilometers with 30 stations elevated above street level, reaching maximum speeds of 80 kilometers per hour. Base fare across all Daegu Metro lines is 1,400 won for adults with single-journey tokens, reduced to 1,250 won with transit cards. A fire on Line 1 on February 18, 2003, at Jungangno Station resulted in 192 deaths and led to nationwide implementation of flame-retardant materials in all metro rolling stock and stations.
Incheon Metro operates two lines totaling 68.5 kilometers. Line 1 connects Gyeyang to Songdo International City with 29 stations across 29.4 kilometers. Line 2, which opened in July 2016, runs from Geomdan Oryu to Unyeon with 27 stations covering 29.2 kilometers. The Incheon International Airport Maglev, a 6.1-kilometer demonstration line, connects Incheon International Airport Terminal 1 to Yongyu Station using magnetic levitation technology developed by Hyundai Rotem. The maglev operates at maximum speeds of 110 kilometers per hour with six stations. Service is free to passengers as the line functions partly as a technology showcase. Daejeon Metro operates a single line of 22.7 kilometers with 22 stations, opened in March 2006.
Gwangju Metro operates Line 1, a 20.5-kilometer route with 20 stations that opened in April 2004. The line runs from Pyeongdong to Noryangri, serving the city's main districts. Trains operate from 5:30 AM to midnight with five to six-minute headways during peak periods. The system uses six-car trainsets manufactured by Hyundai Rotem and Woojin Industries. Base fare is 1,250 won for adults using transit cards.
The Airport Railroad Express (AREX) connects Incheon International Airport to Seoul Station, covering 61 kilometers in 43 minutes via direct express service or 53 minutes via all-stop commuter service. The express service costs 9,500 won for adults and departs every 30 to 40 minutes from 5:20 AM until 10:40 PM. The commuter service costs 4,750 won from the airport to Seoul Station and stops at 11 intermediate stations including Gimpo International Airport, Digital Media City, and Hongik University. Trains depart every five to ten minutes during peak hours. Check-in facilities at Seoul Station allow passengers on Korean Air and Asiana Airlines to complete baggage check and immigration procedures up to three hours before departure.
The Gyeongui-Jungang Line forms an orbital route around northern Seoul, connecting Munsan in the northwest to Jipyeong in the east, covering approximately 80 kilometers. This KORAIL-operated commuter service intersects with nine Seoul Metro lines and handles significant suburban traffic. Trains operate from approximately 5:00 AM to midnight with headways of ten to fifteen minutes. The Suin-Bundang Line connects Incheon to southeastern Seoul suburbs, running 80.4 kilometers from Incheon to Ogeum with 42 stations. This line uses linear motor technology for quieter operation in residential areas.
Intercity bus services in South Korea operate from dedicated terminals rather than on-street departure points. Seoul Express Bus Terminal in Seocho District, connected to Seoul Metro Line 3, 7, and 9, operates approximately 650 departures daily to 65 destinations nationwide. The terminal divides into Gyeongbu (southeast) and Honam (southwest) sections. Express buses to Busan depart every ten to fifteen minutes during daytime hours, covering 400 kilometers in approximately four hours and twenty minutes via the Gyeongbu Expressway. The fare ranges from 27,800 won to 32,000 won depending on the specific service class. Deluxe express buses feature three seats per row instead of four, with increased legroom and cost approximately 42,000 won to Busan.
Dong Seoul Bus Terminal in Gwangjin District, connected to Metro Line 2, handles routes to eastern destinations including Gangneung, Sokcho, and Jeongseon. Approximately 350 buses depart daily. The express bus to Gangneung costs around 20,800 won and takes three hours and forty minutes via the Yeongdong Expressway, which crosses the Taebaek Mountains through multiple tunnels. Seoul Nambu Bus Terminal in Seocho District serves southern Gyeonggi Province and northern sections of Chungcheong and Jeolla provinces with approximately 400 daily departures.
Premium intercity buses operate under branding including Limousine and First Class. These services use coaches with 21 to 28 seats compared to standard 45-seat configurations. Seats recline up to 150 degrees, and amenities include USB charging ports, individual entertainment screens, and complimentary beverages. Premium service from Seoul to Busan costs approximately 52,000 won and uses the same expressway routes as standard services. The Express Bus Lines Association, formed in 1981, coordinates scheduling and pricing among the approximately 60 member companies operating intercity routes.
Intercity buses reach locations without rail service. The bus from Seoul to Andong, serving Hahoe Folk Village, takes approximately three hours and costs 17,200 won, departing from Dong Seoul Terminal approximately 15 times daily. Buses to Sokcho on the northeast coast depart from the same terminal every 30 to 40 minutes, covering 213 kilometers in two hours and fifty minutes for 18,900 won. The route to Jeonju, known for bibimbap and hanok villages, takes two hours and thirty minutes from Seoul Express Bus Terminal and costs 13,600 won with departures every 20 minutes during peak periods.
Local bus networks within cities operate with route numbers and color coding. Seoul city buses divide into four categories: blue buses for long-distance routes along major arterials, green buses for medium-distance feeder routes, yellow buses for circular routes in business districts, and red buses for express routes connecting Seoul to satellite cities in Gyeonggi Province. Blue bus fares are 1,200 won for adults with transit cards, green and yellow buses cost 1,200 won, and red express buses cost 2,400 won. Transfers between buses and metro are free if completed within 30 minutes, with the first fare charged and subsequent transfers within 30 minutes incurring no additional cost up to five total boardings within a two-hour window.
Busan city buses use a similar color system with blue buses for major routes, green for feeder routes, red for seat-guaranteed express services, and town buses for specific neighborhoods. Base fare is 1,300 won for adults using transit cards. The red express buses charge 1,700 won and guarantee seats by limiting passenger numbers. Busan operates approximately 250 bus routes with 3,800 buses serving an average of 1.2 million daily passengers.
Taxis in South Korea operate in three tiers: standard, deluxe, and jumbo. Standard taxis, typically mid-size sedans including Hyundai Sonata and Kia K5 models, charge a base fare of 3,800 won in Seoul for the first two kilometers, then 100 won per 132 meters or 100 won per 31 seconds when moving below 15 kilometers per hour. Between midnight and 4:00 AM, a twenty percent surcharge applies. Standard taxi base fare in Busan is 3,300 won. Deluxe taxis, identifiable by black paint with yellow roof signs, charge 6,500 won base fare in Seoul for three kilometers, then 200 won per 164 meters or 50 seconds. Deluxe taxi drivers undergo additional customer service training and vehicles provide more interior space. Jumbo taxis accommodate up to eight passengers in minivan configurations and charge approximately 6,500 won base fare in Seoul.
International taxis, designated for foreign visitors, operate from major hotels, airports, and tourist areas. Drivers speak English, Japanese, or Chinese and charge the same rates as standard taxis but accept advance reservations and provide translation services. These taxis display multilingual signs and drivers complete foreign language certification through the Seoul Metropolitan Government program established in 2009. Kakao T, the dominant taxi-hailing application launched in 2015, allows users to request standard taxis, deluxe taxis, or larger vehicles with destination input and fare estimation. Payment processes through the app via credit card or Kakao Pay, eliminating cash transactions and communication barriers. The app operates in Korean, English, Japanese, and Chinese. Approximately seventy percent of taxi rides in Seoul originate through the Kakao T platform as of 2023.
Domestic flights connect Seoul's Gimpo International Airport to regional cities including Busan, Jeju, Gwangju, Yeosu, Pohang, and Ulsan. Korean Air and Asiana Airlines operate the majority of domestic routes, with Air Busan, Jeju Air, Jin Air, and Eastar Jet providing additional frequency. The Seoul-Jeju route ranks among the world's busiest domestic air corridors with approximately 180 daily departures during peak season, served by Airbus A320 and Boeing 737 aircraft. Flight time averages 55 minutes. Advance purchase economy fares start around 40,000 won, while walk-up fares can reach 90,000 won. Airlines use Gimpo Airport for domestic routes while Incheon International Airport, 52 kilometers west of Seoul, handles international operations.
The Gimpo-Busan route operates approximately 50 daily departures with flight times of one hour. Advance economy fares begin around 35,000 won. Given that KTX trains complete the Seoul-Busan journey in two hours and eighteen minutes station-to-station, air travel appeals primarily to passengers originating from western Seoul neighborhoods closer to Gimpo Airport than Seoul Station, or connecting to international flights through Gimpo. Gimpo Airport features a direct walkway connection to Seoul Metro Line 5 and Line 9, plus AREX service to Incheon International Airport and Seoul Station.