Seoul to Busan by KTX: Fares, Booking and the 2026 Merger

What changed on September 1, 2026

For nine years Korea had two high-speed operators on this route. Korail ran KTX from Seoul Station; a separate company, SR, ran SRT from Suseo Station in the southeast of Seoul. They used much of the same track, they were booked on different websites, and a ticket for one was useless on the other.

That ended. Korail and SR were merged, and from September 1, 2026, both are simply KTX. The SRT brand is gone, everything is searched and booked in one place, and fares were cut to the lower SRT level — an average reduction of about 10%. On this route the standard fare went from 59,800 KRW to 54,400 KRW.

Two practical consequences. First, most English-language advice you will find about this journey — including 'decide between KTX and SRT' — is now describing a system that does not exist. Second, capacity went up rather than down: the Suseo side gained roughly 30% more seats, with about 15,000 extra seats on weekdays and up to 17,000 at weekends.

How long it takes, and what it costs

The fastest Seoul–Busan services run in about 2 hours 15 minutes. Trains that call at more intermediate stations — Daejeon, Dongdaegu and others — take closer to 2 hours 40 minutes or three hours. The difference is entirely in the number of stops, not the train, so when you are choosing between departures the journey time in the results is the thing to look at, not the train number.

Standard class is 54,400 KRW. First class, called 특실, costs more and buys you a 2+1 seat layout with more legroom rather than any meaningful difference in speed or service; on a two-hour ride most people do not need it. Children's fares and group discounts exist and are applied at booking.

Compare that with the alternatives honestly. An express bus is cheaper and takes four to five hours. A domestic flight from Gimpo to Gimhae is about an hour in the air, but with airport transfers at both ends and check-in, the door-to-door time is roughly the same as the train, and Gimhae is further from central Busan than Busan Station is. For a first trip, the train is the straightforward answer.

Seoul Station or Suseo Station

Now that both are KTX, this is purely a question of which station is easier from where you are staying. Seoul Station is central, on Metro Lines 1 and 4, and connected to the Airport Railroad from Incheon — if you are anywhere near Myeongdong, Jongno or Hongdae, it is the obvious choice. Suseo Station is in the southeast on Line 3 and the Suin-Bundang Line, and is much more convenient from Gangnam, Jamsil or Songpa.

One thing to check in the results rather than assume: after the merger, some Suseo departures run on newer routings that call at Seodaejeon and Gupo. Those are legitimate trains, but they take longer. The booking screen shows the journey time for each service, which is the only number that matters here.

Gupo is worth knowing about as an alighting point. It is in the northwest of Busan on Metro Line 3, so if you are staying that side of the city — or heading for Gimhae — getting off there rather than riding on to Busan Station can save you a backtrack.

Booking

The merged booking runs through the Korail+ app and korail.com, both with English interfaces, and both now return Seoul Station and Suseo Station departures in one search. Tickets can be bought from abroad with a foreign card, and seats open one month before the departure date.

How far ahead to book depends entirely on the calendar. Around Lunar New Year and Chuseok, trains in both directions sell out within minutes of opening and a month's notice is not excessive. Summer weekends and the days around any long public holiday are busy but manageable. On an ordinary weekday, a few days ahead is plenty, and buying an hour before departure usually still works.

If a train is sold out you are not necessarily stuck: standing tickets exist for reserved services, and on a two-hour ride they are a reasonable fallback. You keep your passport with you either way — the ticket is issued to a name.

Is a rail pass worth it?

The KORAIL PASS is a foreigner-only pass, unavailable to Korean nationals, that lets you ride Korail services for a set number of days. It comes as a select pass: you buy 2, 3, 4 or 5 travel days and use them on any days you like within a 10-day window from the start date. Current adult prices are 131,000 KRW for two days, 186,000 for three, 234,000 for four and 275,000 for five, with child fares roughly half.

Do the arithmetic before you buy. A Seoul–Busan return at the new fare is 108,800 KRW, against 131,000 KRW for the cheapest pass. The pass loses on that trip alone. It starts to win when you are also taking side trips — Gyeongju, Jeonju, Yeosu, or a day out from Busan — and each of those journeys is riding on a pass day you have already paid for.

The mechanics: seat reservations open a month ahead and you may reserve up to two per person per day; if a train is sold out you can still board standing with the pass and your passport. First class is available to pass holders at 50% of the first-class fare. A passport and a credit card are needed to buy one, and the pass excludes metropolitan commuter railways and temporary tourist trains.

What the ride is actually like

• Seats are reserved and face forward in one direction of travel; on some services half the carriage faces backward, and it is not something you can choose at booking
• There are no dedicated luggage compartments. Racks sit above the seats and at the ends of each carriage, and a large suitcase goes at the carriage end — board a few minutes early if you have one
• Power sockets exist on most services, though not at every seat, and Wi-Fi is available but unremarkable
• Announcements are made in Korean and English, and the scrolling display shows the next station in both
• Catering is minimal — vending machines rather than a full dining car on most services. Buying food at the station before boarding is what everyone does
• Carriages are quiet by convention. Phone calls happen in the vestibules between cars, not at the seats

Arriving in Busan

Busan Station sits on Metro Line 1, which is the old city's spine: Nampo-dong and Jagalchi are two or three stops south, Seomyeon is a straight run north. For Haeundae or Gwangalli you change to Line 2 at Seomyeon, which brings the total to 45 to 60 minutes from the platform.

The taxi rank is directly outside the main exit, and because the station is already close to downtown, fares into Nampo-dong or Seomyeon are short. With two or more people and luggage, it is usually the better call than dragging suitcases onto the subway.

The station has coin lockers, which matters if your train back is the same evening — leave the bags and do the one-day old city route, which starts two stops away.

• Full onward options, with bus numbers and fares: Busan Station to the city