How to Get from Seoul to Busan — KTX, Flight, and Bus Compared (2026)
Photo by Seungmin Yoon on Unsplash KTX takes 2h15–2h40 and is the most popular option. Flights are faster but cost more door-to-door. Buses are cheapest. Here's how to choose. Seoul and Busan are the two cities most international visitors want to see in Korea. The distance between them is about 400km, and there are four realistic ways to cover it: the KTX high-speed train, the SRT high-speed train, a budget flight, or an express bus. Each has a different cost, travel time, and level of convenience. This guide covers all four with enough detail to make the decision straightforward. Quick Answer The KTX from Seoul Station to Busan Station is the best option for most travelers — roughly 2 hours 15 minutes to 2 hours 40 minutes, trains run frequently throughout the day, and the station-to-station journey puts you directly in central Busan. Budget airlines (Gimpo to Gimhae) can be cheaper when booked well in advance, but total door-to-door time often matches the KTX once airp...