The KTX from Seoul to Busan is one of the busiest routes in Korea. On weekends, public holidays, and peak seasons, it often sells out — sometimes days in advance — and the time or seat you want simply is not there.
If your train shows no seats, you still have a few ways to get on board. Here is what to do when the KTX from Seoul to Busan is sold out.
Check SRT as well
Korea has a second high-speed train, the SRT, that runs the same Seoul–Busan route on a separate booking system and leaves from Suseo Station instead of Seoul Station. Because the two sell seats separately, it is worth checking SRT as well — sometimes one has a seat the other does not. Just keep in mind that SRT is a little cheaper and runs fewer trains, so it is popular with local travelers and can be just as hard to book, or harder. If you are weighing the two, see our SRT vs KTX guide.
Watch for cancellations
Even when a train is marked sold out, seats often reopen as other passengers cancel. The way to catch one is to keep refreshing the app and website and book the moment a seat appears. This works, but it can take a long time, with no guarantee — and you are competing with everyone else who wants that same popular train, Korean travelers included.
One more hurdle for foreign travelers
If you do find a seat, there is still the payment step. Both KTX and SRT accept foreign cards in principle, but international cards are often rejected at the final step — the checkout adds extra checks such as identity verification, 3D Secure, or a Korean phone number, and usually shows only a generic error message. The sites can also feel complicated in English, especially on a phone.
What about booking agencies?
Search for KTX tickets in English and you will find several booking agencies near the top of the results. They are popular for a reason — foreign cards work, and the whole process is in English. For a simple, off-peak trip, they often do the job.
Two things are worth knowing before you pay, though. Most of these agencies add a service fee on top of the official Korail fare, so the total you see is higher than the real ticket price. And some accept “reservations” months ahead — earlier than Korail itself opens sales. That is not a confirmed seat; it is a request the agency tries to fill once tickets actually open. On a busy weekend or holiday, if it cannot be secured, some travelers are told only days before departure that the booking did not go through — after hotels are booked and plans are built around that train.
More to the point for a sold-out train: these are systems, not people. When the seat you want is gone, the page simply shows sold out. It will not keep watching for a returned seat, put together a KTX-plus-bus route to get you there on time, or arrange a quiet seat for a family with an infant, extra luggage, or a pet.
Or let us get the seat for you
If you would rather not spend your time refreshing a screen, The Busaner can get the seat for you. We work on a simple ticket system, and a single ticket also covers our KTX and SRT seat-booking service. One ticket covers a 15-minute booking attempt by one of our Korean staff, working in real time with a domestic account — so you can stay focused on your business, daily life, or trip instead of refreshing a screen. You do not need a Korean credit card or a Korean phone number.
If the request needs more than 15 minutes — for example, several seats, a popular route, or a popular time slot — an additional ticket may be needed. We always confirm with you before a ticket is used.
How it works:
- Message us on WhatsApp, LINE, KakaoTalk, or by email using the buttons below.
- Tell us your departure and arrival stations, date, and preferred time.
- We send you a quote first, then you pay through PayPal. New customers choose one of our ticket options, purchase it, and pay the train fare at its original price. If you already hold tickets, you pay only the train fare — at the original price, with no extra charge from us.
- We book your seat in real time.
- Receive your official e-ticket on your phone, by WhatsApp or email.
We accept overseas cards through PayPal, which is trusted and secure worldwide, so you do not need a Korean card or phone number. A card and currency-conversion fee applies to overseas payments — this is not our margin, only what the payment costs us — and your quote always shows it before you pay. Your rights as a customer are protected under our refund policy.
Or message us on your preferred app: