The nearest metro station is 'Hlavni nadrazi' (red line C ) - get off the metro station - cross the park and walk little bit left - cross the street Opletalova and walk staight in street Ruzova - on your right side no. 5 is Rosemary hostel - ring on the bell outside.

From Airport:
take 119 bus and go to the final station 'Dejvická', take metro line A (the green line) and go 5 stop to 'Muzeum' - get off change for line C (the red line), go 1 stop to 'Hlavni nadrazi' - then follow the direction above.
 
From Bus station Florence (International Bus station):
take a metro (red line - C) and go 1 stops to the station of 'Hlavni nadrazi' - then follow the directions above.
 
From Main Train Station:
'Hlavni nadrazi' (red line C ) - get off the metro station - cross the park and walk little bit left - cross the street Opletalova and walk staight in street Ruzova - on your right side no. 5 is Rosemary hostel - ring on the bell outside.

BY TAXI
From the Airport (Letiste Praha-Ruzyne)
We recommend this company AAA taxi - from Prague just dial 222 333 222 they speak English, you can order taxi by phone.

They ll come in 10-15 minutes to pick you up. Price with this company is about 600,- czk.
 
There is also shuttle service company - CEDAZ - you can go with them, they have little bit lower prices then taxi because you share a minibus with other people.
 
Or if you take a cab in front of arrival hall on the street, before you get in the car ask for the price, because some companies or independent taxis are very expensive.
 
About your return way to the airport ask at the reception desk. We can order a taxi cab for you by phone. They usually come in 10 - 15 minutes.