From the airport:
Go to the airport minibus desk in the arrivals hall (2300 Forints per person, door to door).

From Keleti Railway station:
Take Metro 2 (red line) to Blaha Lujza tér (1 stop) then exit the metro onto Rákóczi út and walk West (away from Keleti). Take the 3rd street on the right and the hostel is directly ahead on the left side of Nyár utca.
Or take bus 7 (not red 7), 7A or 78, 3 stops to Kazinczy utca. Walk back one block and turn left onto Nyár utca.

From anywhere in town
Take metro 3 (blue line) to Ferenciek tere and then take bus 7 (not red 7), 7A or 78 east (away from the river) 2 stops to Vas utca. Walk on to the crosswalk and turn down Nyár utca. The hostel is directly ahead on the left.
Alternatively take tram 4 or 6 around the city ring road (körút) and get off at Blaha Lujza tér. From here you can walk 3 blocks East (or take bus black 7, 7A or 78 one stop and walk back one block) then turn right onto Nyár utca. The hostel is directly ahead on the left.