FlixBus provides more than 200.000 daily connections throughout Europe! Check out the whole route network on FlixBus.de and travel safe, convenient and sustainable. Enjoy free W-Lan, cheap snacks and drinks as well as leg room and enough space for your luggage (2 x luggage + hand luggage)!
As an ESNcard owner it gets even cheaper. Log in on http://esncard.org to get a 10% discount.