PRNewswire-FirstCall -- Frontier Airlines wants to save you more than just daylight this weekend. The Denver-based airline today announced a three-day sale starting today, March 4, 2009, that will get you to more than 50 destinations across the United States, Mexico and Costa Rica for as low as $39* each way. Sale-priced tickets must be purchased by 9:59 p.m. MST on March 6, 2009 for travel through August 26, 2009.