There are direct flights to Luxembourg from Frankfurt, Munich, Berlin, Paris, London and many more. www.luxair.lu
From the airport Frankfurt/Hahn in Germany, there is a shuttle bus to Luxembourg-City.
In Luxembourg-City, take bus number 110 or 111 to get to Echternach.
The Mullerthal Region – Luxembourg’s Little Switzerland has realized a project to improve the mobility of tourists. The new edition of the brochure "Mullerthal Trail Mobility 2014" with bus time tables for hiking trips is available here.