Bariloche

If you would rather take a bus, be prepared for a 20 hours drive through 1587km (986mi) that separate Buenos Aires from Bariloche. Even thought that might not sound too appealing, modern buses offer a very comfortable ride, with totally reclinable seats, music, videoscreen, as well as bar and catering service.
As far as we know, bus companies do not have special prices for foreigners, so it is probably the best to buy your ticket once you are in Buenos Aires.
All respectable bus companies have a sales stand at the Retiro bus terminal (Avenida Ramos Mejía 1680) [ ] in Buenos Aires; you can buy your ticket there, by telephone or by internet at the bus company’s website.

Some of the companies driving to Bariloche are:

ANDESMAR S.A. 4313-4242, 27/D.5/523
VIA BARILOCHE S.R.L. 4315-7700, 121/D28/55
VIA TAC 4315-7700, 21 DEP 7