Seoul to Busan by KTX: fare, travel time, booking and the KORAIL PASS

By the Real Korea 101 editorial team · Published November 13, 2026 · Facts checked November 13, 2026

Short answer: the KTX high-speed train from Seoul Station to Busan Station takes about 3 hours according to the Korea Tourism Organization, with faster and slower trains depending on stops. A standard-class adult ticket was cut from 59,800 KRW to 54,400 KRW on September 1, 2026, when Korail merged the KTX and SRT high-speed services (fare checked November 13, 2026). Since October 1, 2026 you can book up to two months before departure on Korail's website, the KORAIL+ app, station kiosks or ticket offices. For a single Seoul to Busan round trip, regular tickets cost less than the cheapest KORAIL PASS.

Seoul to Busan at a glance

What changed on September 1, 2026

Until August 2026, Korea had two high-speed operators: Korail ran the KTX from Seoul Station and Yongsan, and a separate company ran the SRT from Suseo Station in southern Seoul. In an August 5, 2026 press release, Korail announced that it would run high-speed rail as one service from September 1, 2026. The main points for travelers:

• One brand: the former SRT trains are renamed KTX-Sancheon. Trains from both Seoul Station and Suseo Station are KTX.
• One app: the KORAIL+ app, launched August 3, 2026, lets you search and book all high-speed trains, from Seoul and Suseo, in one place.
• Lower fares: KTX fares were lowered to SRT levels, an average cut of 10%. Korail's example: Seoul to Busan fell from 59,800 KRW to 54,400 KRW, a cut of 5,400 KRW.
• More trains: Korail planned 23 more high-speed runs a day on weekdays and 26 more on weekends, adding about 15,679 seats on weekdays and 17,655 on weekends.

Older guides that mention a separate SRT app, or a 59,800 KRW fare, were written before this change.

How long the trip takes

The Korea Tourism Organization's VISITKOREA Busan guide gives about 3 hours for a KTX from Seoul Station to Busan Station. The same guide says that from Incheon Airport you can take a bus to Gwangmyeong Station (about 50 minutes) and then a KTX to Busan Station (about 2 hours 40 minutes).

Actual times depend on how many stops each train makes. The search results on Korail's website and app show the departure and arrival time of every train, so compare a few departures before you pick one. If time matters, choose the train with the shortest duration rather than the earliest departure.

How and when to book

When tickets go on sale

The Ministry of Land, Infrastructure and Transport (MOLIT) announced that from October 1, 2026, the booking period for KTX and other rail tickets moved from one month before departure to two months before departure. The ministry said the change lets travelers, Korean and foreign alike, book trains at the same time as their flights. Korail confirmed in an October 8, 2026 release that the two-month window started on October 1.

Weekend and holiday trains between Seoul and Busan are busy, so book as soon as your dates are fixed.

Where to buy

VISITKOREA lists these official ways to buy tickets:

• The Korail website, korail.com, which has English, Chinese and Japanese pages
• The KORAIL+ app
• Ticketing kiosks and ticket offices at stations

In a December 29, 2025 release, Korail said it runs multilingual websites in 7 languages and has installed new automatic ticket machines at 148 stations, including Seoul, that offer Korean, Chinese and Japanese language options and accept overseas credit cards. MOLIT says language support will grow to 10 languages by the end of 2026, and that it is developing payment with global wallets such as WeChat Pay and Alipay.

When booking online you can pick your seat with the "Reserve Seat" button. Some KTX seats face backward, so check the seat direction if that matters to you.

Changes, refunds and delays

Korail's August 5, 2026 release describes these rules for its integrated rail members after the merger:

• Free changes: you can change your trip without a fee to a date within 7 days before or after the original travel date, up to 30 minutes before departure.
• 10-minute refund waiver: refunds within 10 minutes of payment are penalty free, up to 30 minutes before departure, twice a day.
• Delay compensation: for delays caused by Korail, 50% of the fare for 60 to 90 minutes late, 75% for 90 to 120 minutes, and the full fare for 120 minutes or more.

Korail's release words these benefits for rail members. If you book as a non-member or with a pass, check the refund rules shown before you pay.

The KORAIL PASS: is it worth it?

The KORAIL PASS is a rail pass for foreign visitors; Korail calls it a pass for foreigners and VISITKOREA says it is exclusively for international travelers. VISITKOREA's train page (last updated August 7, 2026) describes it as a 2, 3, 4 or 5-day flexible pass used within ten days. With the pass you get unlimited use of standard cabins in that period, can reserve seats up to twice a day, can book standing tickets without limit, and can book a first class seat by paying 50% of the first class fare. Subways and temporary tourist trains are not included.

Pass prices are from Korail's December 29, 2025 press release; the comparison column is our own arithmetic using the 54,400 KRW standard fare each way. The pass pays off only if you take several long trips on your travel days, for example Seoul to Busan, then Busan to another city, then back to Seoul. Add up the single fares for your own plan before you buy.

Korail also sells KORAIL PASS+, which adds a prepaid transport card function to the pass for an extra 8,000 KRW, so the same card can be topped up for subways and buses. If you only need city transport, a regular T-money card does that job. For staying connected on the train, see eSIM vs SIM card in Korea, and before you fly, check Korea entry requirements and K-ETA.

Fares, timetables and pass rules change. For anything that affects your trip, the official pages below are the final authority.