Daegu to Seoul High-Speed Train
The KTX trains are a wonderful way to get between Daegu and Seoul. It's the fastest option you can find, often cheaper than taking an airplane or bus, and it is also offers economy class seats for those who are on a budget as well as business class seats that will give you more legroom if needed. The ride takes only 1 h 34 m, so there won't be any needless delays in your trip. You can buy your KTX tickets online, or at the train station.
Rail.Ninja is an online ticket booking platform