The RIAO-OPTILAS Conference has been held in:

OPTILAS:

• I) Colombia (1984)
• II) Brazil (1986)
• III) Argentina (1988)
• IV) Mexico (1993)
• V) Cuba (1995)

RIAO:

• I) Barcelona, Spain, on 1992
• II) Guanajuato, Mexico, on September 21-24, 1995

RIAO-OPTILAS

• I) Cartagena de Indias, Colombia, Sep 28-Oct 2, 1998
• II) Tandil, Argentina, on September 3-7, 2001
• III) Isla Margarita, Venezuela, on October 3-8, 2004
• IV) Campinas, Brazil, on October 21-26, 2007
• V) Lima, Peru, on September 20-24, 2010
• VI)Porto, Portugal, on July 22-26, 2013
• VII) Pucón, Chile, on November 21-25, 2016
• VIII) Cancún, Mexico, on September 23-27; 2019
• IX) San José, Costa Rica, on March 27-31, 2023