I will be arriving at the end of March on a Saturday to Seoul Inchon Airport early at 7a.m. Plan to take AREX to Seoul station and then KTX to Busan. Since we do not know how long it takes to go through immigration as tourist from Thailand, we do not plan to buy any train tickets ahead of time.
Help needed here:
1. Pre-book AREX and/or KTX needed?
2. Can I still use the same tickets if I miss the time stated in the tickets for a later train in case there is delay at the airport with customs and/or flight delays? It seems that the times are specified on their websites.
3. Is weekend volume of passengers a factor in terms of being more crowded? This affect whether I should pre-book the trains, especially KTX.
Thank you .