How to get from the International Airport (Ezeiza)

Cheaper option: 
You can take a shuttle from Manuel Tienda Leon until Retiro Bus Terminal. Should take about 40 mins and cost you about USD 14.-
Once at Retiro, cross the Plaza de Los Ingleses, where there is a replica of Big Ben. 
Take the Line C subway in the direction of Constitucion, stop off at "San Juan." 
You're almost there, just three blocks to go--find the way!

Faster but more expensive option: 
Take a taxi, it should take about 30 minutes and cost around USD27 or ARS95, almost the entire journey should be by highway