KTX high-speed trains: fares and booking

What changed on 1 September 2026

Before September 2026, KTX and SRT had separate operators and booking systems. KTX left Seoul Station and Yongsan; SRT left Suseo, in the south-east of the city; they used different apps, different membership systems, and would not sell each other's seats. That ended.

Korail announced on 5 August 2026 that from 1 September 2026 high-speed operations are unified under one operator. The specifics, from its own release:

• SRT is renamed KTX-Sancheon (KTX-산천). The brand disappears from the timetable.
• Fares fall about 10%, to the old SRT level. Seoul–Busan ₩59,800 → ₩54,400. Yongsan–Gwangju-Songjeong ₩46,800 → ₩42,000.
• 116,000 extra seats a week — 15,679 on weekdays, 17,655 at weekends. Daily departures rise from 379 to 402 on weekdays and 431 to 457 at weekends.
• One app, Korail+ (코레일+), live since 3 August 2026, selling departures from both Seoul and Suseo in a single search.
• Suseo gets the 955-seat trains, the largest sets in the fleet, plus new routings via Seodaejeon and Gupo.

The corporate side was settled first: the Fair Trade Commission and the transport ministry announced joint approval of Korail's acquisition of SR — a business transfer plus a share purchase — with a three-year monitoring agreement binding the fare cut and the seat expansion.

Any guide describing Korea's high-speed rail as two competing operators with two booking apps is now out of date. If a source tells you to compare KTX against SRT prices, it predates September 2026.

Booking through the foreign-language website

Use Korail’s foreign-language booking site to search your departure station, destination and travel date. Korail is Korea’s national railway operator; KTX is its high-speed train service.

Check the available train, seat class, passenger details and overseas-card payment option before paying. Registration and payment requirements can differ between the app, domestic website and international booking pages. An unsuccessful registration does not mean that every booking channel is unavailable.

If the online route fails, ask a staffed station counter for help. Confirm your actual departure station: Seoul Station, Yongsan and Suseo are separate stations.

Seat classes and what you are boarding

The main seating classes are standard (일반실) and first (특실), with availability depending on the train. First class commonly offers wider seating and more space; the fare premium is meaningful but not extravagant, and on a full holiday train it is often the only thing left. Korail's own service list confirms 특실 as the upgrade tier — expectant mothers, for instance, get either a 40% fare discount or a free 특실 upgrade.

There is also 입석 — a standing ticket, sold when seats are gone. It is a legitimate product, it is cheaper, and on the Seoul–Busan run it means two and a half hours in a vestibule. From September, standing tickets and 자유석 (unreserved carriages, weekday commuter hours) extend onto the former SRT routes as well.

The rolling stock matters more than most people expect, because it changes the seat you get. All figures below are Korail's own:

Compare the train type as well as the departure time. The older KTX sets pair two seats to one window, so half the passengers get a pillar; the Eum (이음) gives every seat its own, plus a power socket. It runs the Jungang line — Seoul to Bujeon in Busan — rather than the Gyeongbu main line.

Luggage: there is no hold

Ordinary passenger rail travel does not include airline-style checked baggage. For ordinary passenger travel, you carry your own luggage on and off the train. Whatever you bring on, you carry on, and you find somewhere for it yourself.

The options, in the order you will try them:

1. Overhead racks. Open shelves running the length of the carriage. Cabin-size cases fit; a 28-inch case does not.
2. The space at the end of the car, by the doors between carriages. This is where large cases go, it is unsecured and unsupervised, and on a busy departure it fills before the train does. Boarding early is the whole strategy.
3. Ask the crew if the luggage areas are full. Do not block an aisle, doorway or another passenger’s space.

A full-size suitcase on a full Friday-evening KTX is a real problem rather than an inconvenience. Two things soften it: board at the origin station, where you get first claim on the end-of-car space, and consider luggage delivery to your hotel instead of carrying it, which is a separate service and often cheaper than the stress.

Stations

Seoul Station (서울역) is the main gateway — KTX to Busan and to Mokpo, subway lines 1 and 4, and the airport express to Incheon. The concourse is large, signed in English, and the platform gates are on an upper level, so allow ten minutes from the subway barrier to the seat rather than three.

Yongsan (용산역) handles the Honam and Jeolla lines — Gwangju, Mokpo, Yeosu. It is not an overflow for Seoul Station; it is a different set of destinations, and a ticket from one is not valid at the other.

Suseo (수서역) is the third, and the one that catches people. It is in Gangnam, in the far south-east, on subway line 3 and the Bundang line, and SR describes it as "SRT's first and last train station" with a direct transfer passageway from the subway. It is roughly 45 minutes from Seoul Station by underground. A ticket from Suseo is not a ticket from Seoul, and after the merger a single search returns both — so read the departure station before you pay.

Busan Station (부산역) is the southern terminus, on subway line 1, walkable to Choryang and a short ride from Seomyeon and Haeundae.

The KORAIL PASS, and who it is for

The pass is foreigners only, and Korail's own booking system proves it: the nationality selector on the pass purchase route offers 177 countries and Korea is not one of them. A Korean national cannot complete the form.

As currently sold it comes in exactly four shapes — flexible 2-, 3-, 4- and 5-day passes — in adult and child only. The older consecutive-day product and the youth tier are not in the current list. "Flexible" means the travel days need not be consecutive, which is the change that makes it worth considering: you can spend three of ten days on trains and idle the rest. Check the current pass prices and conditions before buying.

Whether it beats point-to-point tickets is arithmetic, and the September fare cut moved the answer against the pass by about 10%. A single Seoul–Busan return is now ₩108,800. Add the prices of the individual journeys you plan and compare that total with the applicable pass. Check whether each train is included and whether a seat reservation is required.

Check the conditions before booking

• Refunds and changes got better in September. Tickets can now be changed to seven days either side, free, until 30 minutes before departure. A refund is penalty-free if made within 10 minutes of paying (up to 30 minutes before departure, twice a day).
• Delay compensation is tiered: 50% of the fare for 60–90 minutes late, 75% for 90–120, and the full fare beyond 120 minutes.
• Holiday travel is a different world. Seollal (Korean Lunar New Year, the biggest family holiday of the year) and Chuseok (the Korean autumn harvest holiday, the year's other big family break) tickets are sold weeks ahead through an online-only, members-only round that a visitor essentially cannot enter. Chuseok 2026, 24–26 September, is the first under the merged operator.
• Mileage is 5% of what you paid, and now applies to Suseo departures too — worth having if you are taking several trains.