Spirit Airlines if offering $35 off flight purchases when you use promo code 35HOURS on their site. Book by 11:59 PM ET on May 4, 2009 and enter 35HOURS (all caps, no spaces) in the Promotion Code box on the home page when booking your flight to save $35* off your roundtrip purchase for travel from August 11, 2009 through November 17, 2009.

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