Top KTX Routes for Tourists Visiting South Korea

KTX, short for Korea Train Express, is South Korea’s high-speed rail system operated by Korail. Trains can reach speeds of up to 305 km/h (190 mph), making them one of the fastest ways to travel across the country. The network links major cities such as Seoul, Busan, Daegu, Daejeon, Gwangju, and Mokpo, significantly reducing journey times compared to conventional trains or buses. For instance, the Seoul–Busan trip, which once took more than four hours, now takes about 2.5 hours by KTX.
Onboard, passengers can expect modern facilities including comfortable seating, Wi-Fi, power outlets, and luggage storage.

The Seoul to Busan KTX line is without question the most popular and widely used route in the country. Tourists love this route because it connects two of South Korea’s most exciting cities: Seoul, the capital full of palaces, markets, and nightlife, and Busan, known for its sandy beaches, vibrant seafood markets, and historic temples. The trip covers approximately 417 kilometres and takes just about 2 hours 19 minutes, a journey that once took over four hours by conventional train. Along the way, travellers can relax in modern, air-conditioned coaches with reclining seats, power outlets, and Wi-Fi. What makes this one of the top KTX train routes is not just the speed, but the diversity of experiences awaiting at each end.

In Seoul, tourists can wander through Gyeongbokgung Palace or shop in Myeongdong. In Busan, Haeundae Beach and Jagalchi Fish Market are must-sees. The ease of travel encourages many visitors to spend a day in Busan before returning to Seoul, proving how convenient this connection really is. High-speed trains make the journey between the two cities quick and comfortable, saving valuable sightseeing time. Many travellers enjoy sampling Busan’s famous street food before catching an evening train back to the capital. The contrasting atmospheres of historic Seoul and coastal Busan provide a balanced cultural experience.

The Seoul to Gwangju KTX covers approximately 357 km, with journey times typically ranging between 1 hour 40 minutes and 1 hour 55 minutes - making it one of the most efficient ways to travel between the capital and the southwest region. There are around 4 daily departures from Seoul, providing flexibility for most itineraries.
Gwangju, renowned for its rich cultural heritage and contemporary arts scene - including events like the Gwangju Biennale and the World Kimchi Festival - is easily accessible thanks to this quick and comfortable high - speed service. The city also serves as a gateway to the scenic Jeolla region, famous for its traditional cuisine and picturesque countryside. Travellers can enjoy a mix of modern museums, historic landmarks, and vibrant markets once they arrive.

The Seoul to Daegu KTX is one of the shortest yet most rewarding trips you can take by train in South Korea. The journey lasts only about 3 hours 20 minutes, making it ideal for a day trip or an overnight stay. Daegu is a city steeped in history, known for its traditional medicine markets, Buddhist temples, and mountain hiking trails. It is often considered the gateway to historic Korea because of its proximity to UNESCO World Heritage sites like Haeinsa Temple. For travellers who want to explore authentic Korean culture, this is one of the top KTX train routes. The combination of speed, comfort, and cultural discovery makes this journey especially popular among both locals.

The city also offers vibrant shopping districts and a lively food scene, blending tradition with modern flair. Autumn is a particularly beautiful time to visit, when the surrounding mountains are covered in colourful foliage. Daegu’s efficient public transport makes it easy to navigate the city once you arrive. Many visitors pair their trip with nearby cultural villages for a deeper experience. Overall, the quick rail connection makes Daegu an accessible and enriching destination from Seoul. With frequent departures, travellers can plan their trip with great flexibility. The comfort of KTX trains ensures that the journey is just as enjoyable as the destination itself.

The Seoul to Daejeon KTX route is one of the most efficient connections in the country, taking just under an hour. It is ideal for travellers on a tight schedule who still want to explore beyond the capital. Daejeon is often referred to as Korea’s Silicon Valley because of its many research institutes and science parks. Families especially enjoy this route because the attractions are educational and engaging. The city is also known for its natural hot springs, offering a relaxing break after sightseeing. Food lovers often stop by the famous Sungsimdang Bakery, a local icon with unique treats. With quick travel times and diverse attractions, this route appeals to both day-trippers and longer-stay visitors.