trains are very expensive! they are the fastest way (well, besides flying of course). flying sometimes is a lot cheaper - make sure to check Ryanair flights! I usually look on skyscanner.com for flights :) you can search by country (not just city), and to location: everywhere/anywhere :) which is handy for finding the cheapest flight anywhere if you're not tied to certain locations. if you are flexible, travel is much cheaper! I'm happy to share tips! but between skyscanner/ryanair flights, buses like flixbus, and carsharing like blablacar - you'll make it a lot more affordable! ask me anytime :D