How to Get from Seoul to Busan — KTX, Flying, SRT Express Bus, and Comparisons— A Local's Take
Image by Sebastian from Pixabay
Busan is one of my favorite cities in Korea — and honestly, one I never need much of an excuse to visit.
Seoul and Busan feel like two completely different worlds. Busan has the sea, the hills, the raw fish markets, and an energy that is distinctly its own. Every season works: spring along the waterfront, summer at the beach, autumn in the hillside neighborhoods, winter at Jagalchi with a bowl of something warm. If you are spending time in Korea and have a few days to spare, Busan deserves to be on your list.
Getting there is easy. Here is everything you need to know.
In this guide
KTX — The Best Option for Most People
The KTX is South Korea’s high-speed rail, operated by Korail. On the Seoul–Busan route it is fast, frequent, comfortable, and drops you directly into the center of the city at Busan Station. For most visitors, it is the obvious choice — and it is always mine.
I find the KTX just simpler in every way. You walk into Seoul Station, sit down, and a little over two hours later you are in Busan. No security lines, no baggage restrictions, no long taxi ride from an airport on the edge of the city. You step off the train and you are already downtown. That convenience is hard to compete with.
The basics
KTX trains depart from two stations in Seoul: Seoul Station (Lines 1 and 4, plus the AREX from Incheon Airport) and Yongsan Station (Line 1, about 10 minutes south). If you are arriving straight from Incheon Airport, Seoul Station is the natural choice — the AREX drops you right there. If you are staying in Itaewon or Yongsan-gu, Yongsan Station saves you a transfer.
Trains run roughly every 15 to 30 minutes during peak hours, with the first departure around 5:15am and the last around 9:00pm. Journey time is 2 hours 15 minutes on the fastest nonstop service, or up to 2 hours 40 minutes on trains making stops at Daejeon, Dongdaegu, or Ulsan.
Seat classes
Economy class is perfectly comfortable — reclining seats in a 2+2 layout, power outlets at every seat, free Wi-Fi. The fare is around ₩59,800 one way. This is what I take every time — for a two-hour trip, it is more than enough.
First class costs around ₩83,700 (about 40% more) and gets you a 2+1 layout with more legroom, a complimentary snack and water, and lounge access at Seoul, Yongsan, and Busan stations. A nice upgrade, but not one I find necessary on a trip this short.
How to book — step by step
This is where most first-time visitors run into trouble. Here are your options:
- Korail website (letskorail.com) The official site has an English version that accepts international credit cards. Select English, enter your route and travel date, choose your train and seat, create an account with your passport number, and pay by Visa or Mastercard. Your e-ticket arrives by email.
- KorailTalk app Available on iOS and Android with an English interface — smoother than the website on mobile. Search, select, and pay. Your QR code e-ticket lives in the app. No printing needed.
- At the station Ticket machines at Seoul Station and Yongsan Station have English interfaces and accept international cards. The staffed counter works too. Fine for same-day or next-day travel, but do not rely on walking up for a busy weekend departure.
- Third-party platforms Klook and Trip.com sell KTX tickets with full English support and PayPal. Convenient, but they charge fees. If you are comfortable with the Korail site or app, use those — they are cheaper.
When to book
For weekday travel, a few days ahead is usually enough. For Friday evenings, weekends, and public holidays, book as early as possible — popular departure times sell out. Tickets open one month in advance at stations and further in advance online.
📍 Yongsan Station | Line 1
Flying — When It Makes Sense
There are two options most people consider for Seoul to Busan: the KTX and the plane. I always take the train, but it is worth understanding the flight properly so you can decide what works for you.
Domestic flights from Gimpo Airport to Busan’s Gimhae Airport take about 55 minutes in the air. But getting to Gimpo from central Seoul takes 40 to 60 minutes depending on where you are staying. Add check-in time, security, boarding, and then the transfer from Gimhae Airport into central Busan, and the total journey takes noticeably longer than the KTX from door to door.
That said, flying can genuinely make sense in a few situations. If you are staying far from Seoul Station but close to Gimpo, the equation shifts. If your accommodation happens to be in western Seoul near the Gimpo area, the airport is relatively easy to reach. And if your travel schedule happens to align better with the flight timetable than the train timetable, there is no reason not to fly. Budget carriers like Jeju Air and Air Busan serve the route regularly.
Both options are easy and comfortable. For most people staying in central Seoul, I find the train more convenient — but it depends on where you are coming from.
SRT and Express Bus — Other Options
SRT
South Korea’s second high-speed rail service runs a parallel route to Busan at a slightly lower fare (around ₩52,600 economy — about 12% cheaper than KTX). Journey time is comparable at around 2 hours 20 minutes. The catch: SRT departs from Suseo Station in southeastern Seoul, which adds a transfer for most visitors. If you are staying in Gangnam or the southeastern part of the city, Suseo is convenient and the SRT is a smart choice. For everyone else, the time getting to Suseo largely cancels out the saving, and the KTX from Seoul Station wins on simplicity. Book through the SRT app or at etk.srail.kr.
Express bus
The bus is the cheapest option and more comfortable than you might expect. Standard fare is around ₩23,000, premium (three-abreast seating, more legroom) is around ₩34,000. Journey time is about 4 to 4.5 hours in normal traffic — longer on holiday weekends. There is a rest stop roughly halfway through for about 15 minutes.
Buses to Busan depart from two terminals in Seoul:
- Seoul Express Bus Terminal (Gangnam) — The main hub. Lines 3, 7, and 9 at Express Bus Terminal station. Address: 194 Sinbanpo-ro, Seocho-gu. Most visitors will use this one.
- Dong-Seoul Bus Terminal (Gangdong) — Line 2, Konkuk University Station. A more convenient option if you are staying in eastern Seoul or the university belt area.
Book online at kobus.co.kr or pick up tickets at the terminal counter — buses rarely sell out except during major holiday windows.
The bus is worth considering if you are on a tight budget, want to travel overnight, or simply are not in a hurry. If you have a packed day in Busan planned, the time you save on the KTX is hard to give up.
Comparison at a Glance
| Option | Time (station to station) | Price (one way) | Best for |
|---|---|---|---|
| KTX | 2h 15m – 2h 40m | ₩59,800 / ₩83,700 (first) | Most visitors — fast, central, simple |
| Flight | 55 min (air time only) | ₩50,000 – ₩100,000+ | Those near Gimpo, or flexible schedules |
| SRT | 2h 20m – 2h 50m | ~₩52,600 | Gangnam / southeast Seoul visitors |
| Express bus | 4h – 4h 30m | ₩23,000 – ₩34,000 | Budget travelers, overnight travel |
* All times are station to station. Flight time is air time only — allow extra time for airport transfers at both ends.
Frequently Asked Questions
- Do I need to book KTX tickets in advance?
- For weekday travel, a day or two ahead is usually fine. For Fridays, weekends, and public holidays — especially Chuseok and Lunar New Year — book as early as you can. Popular morning and evening departure times fill up first. Tickets open one month in advance at stations and further ahead online.
- Can I use an international credit card to buy KTX tickets?
- Yes. The Korail website (letskorail.com) and KorailTalk app both accept international Visa and Mastercard. Klook and Trip.com also work and accept PayPal. If an older station machine gives you trouble, head to the staffed ticket counter instead.
- KTX or flight — which is better for Seoul to Busan?
- For most people staying in central Seoul, the KTX wins on convenience. The flight is 55 minutes in the air, but once you add the journey to Gimpo, check-in, and the transfer from Gimhae into central Busan, the total trip takes noticeably longer than the train. The KTX takes 2 hours 15 minutes from Seoul Station to Busan Station, with no security lines and no baggage restrictions. If you are close to Gimpo or your schedule works better with the flight, flying is a perfectly good option — but the train is usually the simpler call.
Book the morning KTX, spend the day at Jagalchi Market or Haeundae, and take the evening train back. It is one of the best day trips in Asia — and two hours on the KTX, with a coffee and the Korean countryside rolling past the window, is honestly part of the fun.
More Seoul practical guides coming. Stay tuned!
