Today only, Spirit Airlines via ShermansTravel takes 55% off nationwide roundtrip fares via coupon code "55PCT". (Discount applies to the base fare only; additional taxes, fees, and fuel charges are unaffected.) That's the strongest discount we've seen from Spirit. Book this travel deal today for travel from June 18 through November 20. Buy Now Tips On the ShermansTravel landing page, click "" in the top paragraph to see this sale.