operate Flashcards http://www.flashcardexchange.com/tag/operate www.flashcardexchange.com: operate Flashcards en-us Mon, 28 May 2012 08:32:27 PDT Mon, 28 May 2012 08:32:27 PDT support@flashcardexchange.com 720 Airlines' Codes http://www.flashcardexchange.com/flashcards/view/322254 Carriers that operate as Delta Connection and/or United Express. 2006-01-05 http://www.flashcardexchange.com/flashcards/view/322254