關於「Busan to Seoul train price」標籤，搜尋引擎有相關的訊息討論：

Trains from Busan to Seoul from S$ 29.29 - Trip.comsg.trip.com › trains › korail › route › busan-to-seoulBusan to Seoul Rail Tickets | KTX High-speed Train | Online Bookingrail.ninja › route › busan-to-seoulFrom Seoul to Busan in 2 hours 15 mins by KTX Train | Rail.Ninjarail.ni