KTX and rail travel

KTX Gyeongbu Line Guide: Seoul to Busan, Dongdaegu and Ulsan Stations

This is the line most travelers mean when they picture Korea's high-speed rail network.

REVIEWED AUG 28, 2026 · VERIFY LIVE RULES BEFORE TRAVEL
Tip: Confirm whether your ticket departs from Seoul Station or Yongsan Station -- both serve Gyeongbu Line trains, but they're separate stations, and showing up at the wrong one with a tight connection is a genuinely common and avoidable mistake.
KTX Gyeongbu Line Guide: Seoul to Busan, Dongdaegu and Ulsan Stations — Korea travel photo
Photo: Koursea Editorial

The route and key stations

The Gyeongbu Line is Korea's original and busiest KTX corridor, running from Seoul (or Yongsan) south through Daejeon, Dongdaegu and Ulsan before terminating in Busan, tracing the country's main north-south economic spine. Dongdaegu serves as the gateway to Daegu, while Ulsan's station primarily serves the industrial city and its nearby coastal attractions, making this line useful for more than just a straight Seoul-to-Busan trip.

Travel times and frequency

  • The fastest direct Seoul-to-Busan KTX trains cover the roughly 400-kilometer distance in about two and a half hours.
  • Trains run frequently throughout the day, often multiple departures per hour during peak periods, making this one of the most flexible long-distance routes in the country.
  • Not every train stops at every station -- some are express services skipping smaller stops, so check your specific train's stop pattern if a mid-route station is your destination.

Booking tips for this line

Because this is Korea's most heavily traveled rail corridor, trains around weekends, holidays and Korean holiday periods (like Chuseok and Lunar New Year) sell out well in advance, so booking as early as your plans allow is worth doing rather than assuming same-day availability. The Korail app and website both support English-language booking with international card payment, making advance booking straightforward even before arriving in Korea.

The Gyeongbu Line is Korea's busiest and most frequently serviced KTX route, with trains departing Seoul Station at short intervals throughout the day, making same-day round trips to Busan or Daegu genuinely practical for a day of sightseeing. Dongdaegu functions as a major interchange for travelers continuing on to other parts of Gyeongsang province, not just a stop on the way to Busan. Booking a seat in advance for weekend and holiday departures is strongly recommended, since this route's popularity means tickets for peak times can sell out days ahead.

Official sources

Time-sensitive details were checked against the original sources below on 2026-08-28.