Dreaming of Busan's beaches after Seoul's hustle? The 325km trip is a breeze with high-speed trains, buses, or flights—KTX is the top pick for most travelers at just 2.5 hours city-center to city-center. Options suit every budget and vibe: speedy trains, cheap buses, or quick flights. Book ahead for weekends; Korea Rail Pass saves if multi-city hopping. 🚄 Book KTX Seoul to Busan Now More Korea Travel Itineraries 1. KTX High-Speed Train: Best Overall KTX bullet train from Seoul Station to Busan Station: 2h20m-3h, 70+ daily. Economy ~60,000 KRW ($45), First Class 85,000 KRW ($65). Scenic Gyeongbu line views. Suseo SRT (Suseo Station, Gangnam): Slightly faster/cheaper at 2h10m, 51,000 KRW. Cross-operation since 2026 means flexible starts. Book via Korail app/site (English), 1 month ahead. Rail Pass covers unlimited KTX. 🚀 KTX Booking Steps Download Korail app or site (passport for foreigner ID). ...