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That's tied with the best discount we've seen on Frontier flights, and includes destinations such as Orlando, Nashville, and Las Vegas. Shop Now at ShermansTravelSearch Tips Apply coupon code "TREAT" to yield this discount; discount applies to base fare only. On the ShermansTravel landing page, click "FlyFrontier.com" in the top paragraph to see this sale. Blackout dates apply. Book this travel deal today for flights through December 18.