Planning Seoul to Busan? This exhaustive 2026 guide covers every detail: KTX/SRT exact booking process (step-by-step with app/site), Korea Rail Pass purchase/use (including new Plus version), bus terminals/routes/schedules, flights with airport transfers (Gimpo/Gimhae light rail/bus), times, prices, stops, pro tips. Self-contained—no extra searches required. Distance: 325-417km. Top choice: KTX (2h20m-3h, central stations). Budget: Bus (4-5h). Quick: Flight (1h air + transfers). Book early for peaks (weekends/holidays). 🚄 KTX Tickets & Rail Pass Buy Here All Korea Itineraries on My Blog 1. KTX High-Speed Train: #1 Choice (Detailed) KTX (Korail): Seoul Station (용산구 Yongsan) to Busan Station (동구 Dong-gu). Time: 2h20m fastest (e.g., KTX-1 #101, 300km/h), avg 2h40m. 70+ daily (5:30am-10pm, every 15-30min). Stops: 8-12 major (Suseo optional, Daejeon, Dongdaegu). Economy: 59,200 KRW ($44), Prestige (1st): 88,800 KRW ($66). WiFi...