Travel Discounts Exclusively for Sigma Delta Pi Members Posted on September 20, 2018 by Sigma Delta Pi / La Sociedad Honoraria de la Lengua Española in Member Benefits, Travel Discounts Sigma Delta Pi, the National Collegiate Hispanic Honor Society, announces exclusive travel discounts for its members: Click here for related details. Related Published by Sigma Delta Pi / La Sociedad Honoraria de la Lengua Española View all posts by Sigma Delta Pi / La Sociedad Honoraria de la Lengua Española