Today only, Frontier Airlines via ShermansTravel cuts 60% off select Frontier Airlines Flights Nationwide via coupon code "SAVE60". (On the ShermansTravel landing page, click "FlyFrontier.com" in the top paragraph to see this sale; discount applies to base fare only.) Several route exclusions and blackout dates apply. Book this travel deal today for travel on select days from April 24 through May 22.