II - By Bus
From Rio to Búzios - direct:
The company Viação 1001 offers daily departures from Rodoviária Novo Rio (Novo Rio Bus Terminal - Rio) at the following schedule:
Leaving Rio: 06, 09, 11, 13, 15, 17 and 19
Leaving Búzios: 7, 9, 11, 13, 15, 17 and 19.
Fare: From R$ 23.20 to R$ 25.30 (schedules and fares supplied by Viação 1001)
Usefull Telephones:
Viação 1001: 55-21 4004-5001 (only in Brazil)
Rod. Novo Rio (Rio Bus Terminal): 55-21-2291-5151
Website: www.autoviacao1001.com.br
TIPS:
You can buy tickets paying by creditcard using the phone 0300-313-1001 (only in Brazil)
In periods of high season (from December to March) and holidays it is convenient to buy your tickets in advance.
Always confirm these schedules and fares with "Viação 1001".
NOTE: To get to the Rodoviária Novo Rio (Novo Rio Bus Terminal) from the Rio de Janeiro International Airport, you can take taxis (about R$ 30,00) or Viação Real air-conditioned busses, with several departures all day.
Source: http://www.buziosonline.com.br/home/english/