PRNewswire -- While you're wearing green this St. Patrick's Day, Frontier Airlines wants to save you some green, too. The Denver-based airline today announced a three-day sale starting March 16, 2009, that will get you to more than 20 destinations across the United States for as low as $39* each way. Sale-priced tickets must be purchased by 9:59 p.m. MDT on March 18, 2009 for travel through June 10, 2009 or Aug. 26, 2009, depending on route.
