Go by bus No.191 to the station 'Stadion Strahov', continue by bus No. 176 to the station 'Svandovo divadlo'. Walk over the square towards a big court house. Go clockwise around it, right behind the court house is A&E Hostel Prague. It only takes 2 minutes to walk. The whole journey from the airport to the hostel takes max. 1 hour.
(Taxi approx. 600 CZK/ 20 EUR)