You have a few days in Korea and you want to see Busan. Every English guide tells you to download Korail Talk, go to letskorail.com, and budget about 60,000 won each way.
All three of those are out of date as of this month.
I sat down to check the Seoul-Busan fare for this article and the number came back lower than any English page I could find. Then the app name changed under me as well. Korea rebuilt its high-speed rail booking this summer, and the English internet has not caught up.
Here is what actually works, checked line by line against Korail's own English site on 24 August 2026.
The app every guide names was replaced in August
Korail Talk was rebuilt and renamed. On August 3, 2026, Korail launched KORAIL+, which puts KTX and SRT tickets in one app for the first time.
If you already have Korail Talk installed, it updates into KORAIL+ on its own. If you are installing fresh, search the app store for KORAIL+ rather than the old name.
Korail's own English "Ticketing Guide" page still says "KORAIL Talk" as of today. The official Chuseok notice published two weeks later says "KORAIL + (app)". When two pages on the same site disagree, trust the newer notice.
Where to actually book KTX tickets
There are four ways to book KTX tickets, and they are not equivalent. The vending machines and station counters matter more than English guides admit, because they sidestep the account problem entirely.
| Channel | Opens | Closes |
|---|---|---|
| Website / KORAIL+ app | 07:00, one month ahead | 20 min before |
| Vending machines | — | 10 min before |
| Station counter | — | At departure |
The booking window is the part people get wrong. You can book KTX tickets from 07:00 exactly one month before your travel date, not thirty days rolling from midnight.
Third-party resellers like Klook and Trip.com sit on top of this. They charge a markup for one real service: they take any card and never ask you to hold a Korean account. If Korail's own checkout works for you, you are paying that markup for nothing.
Your foreign card does work
This is the question that stops most people, and the answer is better than the forums suggest. You can book KTX tickets straight from Korail with an overseas card, because Korail runs a dedicated foreign credit card payment channel.
I can point at proof rather than a rumour. On August 21, 2026 Korail posted an English notice titled "Temporary Suspension of Foreign Credit Card Payments" for a two-hour maintenance window. A system cannot be taken down for maintenance unless it exists.
That is a real contrast with tapping through a subway gate, where an overseas Visa or Mastercard still does not work at all. Rail booking and transit gates are two different systems in Korea, and only one of them is open to your card.
Notices on the Korail site are posted as images, not text. I only read that one because the image carried alt text; the second page of the Chuseok notice carried none. Browser translation will show you a blank box.
Fares dropped on September 1
KTX and SRT merged into one operation on September 1, 2026, and high-speed fares were cut to the old SRT level, an average of about 10 percent.
| Route | Before | From Sept 1 |
|---|---|---|
| Seoul-Busan | 59,800 | 54,400 |
| Yongsan-Gwangju Songjeong | 46,800 | 42,000 |
SRT also disappears as a brand. Those trains are now called KTX-Sancheon, which quietly retires every "KTX vs SRT, which should I take?" article written before this summer.
Is the KORAIL PASS worth it? Here is the arithmetic
The KORAIL PASS is sold only to foreign passport holders, and Korail publishes the prices openly. It is a select pass, not a consecutive one: you pick 2 to 5 travel days inside a 10-day window.
| Pass (adult) | Price | Break-even |
|---|---|---|
| 2 day | 131,000 | 3 rides |
| 3 day | 186,000 | 4 rides |
| 4 day | 234,000 | 5 rides |
| 5 day | 275,000 | 6 rides |
Break-even is measured against a 54,400 won Seoul-Busan leg. The 3-day pass costs 186,000 won, so three long rides still leave you behind and the fourth is where it turns.
Most itineraries do not reach that. Seoul to Busan and back is two rides. You need a genuine multi-city loop for the pass to pay.
Three details decide it before the price does. The pass excludes SRT, metropolitan subway lines and seasonal tourist trains; children under 6 ride free with an adult, one per adult; and first-class seats cost pass holders half the normal first-class fare.
With SRT rebranded as KTX-Sancheon, it is not yet clear whether those Suseo-line trains become pass-eligible. The pass page still lists SRT as excluded. Ask at the counter before you build a route around it.
Two rules about the paper that will catch you out
Korail is strict in a way that surprises people who booked everything on a phone.
You must carry a printed KORAIL PASS. Not a PDF on your screen, not a photo. The pass page states plainly that possessing the printed pass is mandatory.
And separately: a screenshot of a train ticket is not valid. A live ticket screen inside the site or app counts; an image of one does not. If your phone dies, a screenshot will not save you.
Seats, bags and which Seoul station you leave from
Seoul has two high-speed departure points and they serve different lines. Seoul Station covers the Busan corridor; Yongsan covers the southwest toward Gwangju. Getting this wrong costs you the train, not just the platform.
Seat reservations for pass holders open one month before departure, capped at two tickets per person per day. If a train is sold out, your pass still lets you board and stand.
There is no dedicated luggage car. Large suitcases go on the racks at the end of each carriage, which fill first, so a seat near a carriage door is worth choosing.
One more that costs money: refund penalties are gentle on Monday to Thursday, where cancelling more than two days out is free. On Friday to Sunday and public holidays a minimum cancellation fee applies even a month ahead.
Chuseok: the booking window is September 7 to 11
Chuseok travel runs September 23 to 27, 2026, and those trains are not sold the normal way.
Booking opens for priority groups on September 3 to 4, and for everyone on September 7 to 11. Two things about that window will strand you if you miss them.
Membership registration is required, and tickets are not sold at station counters during the special period. In other words you can only book KTX tickets online that week, so walking into Seoul Station expecting to buy a seat is the mistake to avoid.
Miss it and you are not finished. Remaining seats go on sale September 11 at 15:00 through the app, the website and, at that point, station counters too. You may book up to 12 tickets in total, six per transaction.
Korail's English notice prints the general window as "September 7 (Mon) ~ September 4 (Fri)", which cannot be right. The Korean announcement says September 7 to 11. I flag it because a reader trusting the English text would arrive on the wrong day.
Frequently Asked Questions
Can I book KTX tickets without a Korean phone number?
Booking on the Korail website with a foreign credit card does not require a Korean number. The Chuseok special period is stricter because it requires membership registration, so set that up before September 7 rather than on the morning.
Is the KORAIL PASS cheaper than buying tickets?
Only past roughly four long-distance rides. A 3-day adult pass is 186,000 won against a 54,400 won Seoul-Busan leg, so a simple there-and-back trip loses money on the pass.
What happened to SRT?
It merged into Korail on September 1, 2026 and those trains are now branded KTX-Sancheon. Booking for both now happens in the KORAIL+ app or on the Korail site.
How far ahead can I book?
Tickets open at 07:00 one month before the departure date and stay on sale until 20 minutes before departure on the website. Chuseok and other major holidays run on their own separate schedule.
Wrapping Up
Check the fare on the day. The September 1 cut means older numbers run high, and I would rather you find a cheaper ticket than trust my table.
If your trip is one return journey, skip the pass and book KTX tickets as singles with your own card. If you are looping through four cities, run the arithmetic above against your actual route.
And if you are travelling anywhere near the end of September, put September 7 in your calendar now. That is the whole game.
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