[Tarsul]

Problem with their website is that it appears that your journey is possible only to then be disappointed at the last step of the check-out. Happens way too often and especially for international travel.

Btw. I nearly traveled from Budapest to Hamburg in a single train but alas as written above I had to put in a stop in Munich just so that I could finish my order (both routes were roughly 14hours which I found quite manageable).