From Ministro Pistarini International Airport (Ezeiza):
• Shuttle Bus: Ask for Manuel Tienda León
it has regular services each every 30 minutes (usd 10).
Faster but more expensive option, it should take around 30/40 minutes to get to the Hostel cost nearly U$D32 or AR$ 1200, the entire journey should be by highway.
• Bus Number 8
This is the cheapest (under 20 pesos) but least comfortable way to get to and from the airport. The ride lasts about 2 hours and before taking the bus you will need buy the SUBE card. Within Capital Federal the 8 bus stops in Plaza de Mayo as well as in Plaza Congreso. Be sure to take the bus that specifies that it stops at Aeropuerto Ezeiza on its front.