Ending today, Frontier Airlines via ShermansTravel discounts select one-way airfares, with prices starting from $28.30. That's the lowest price we could find for select routes by at least $59. Book this travel deal today for travel between August 13 and October 2. Buy Now Tips On the ShermansTravel landing page, click on "FlyFrontier.com" in the top line to see this sale. We found this price on flights departing from Philadelphia, PA (PHL) with arrival in Cincinnati, OH (CVG) on August 13. All prices, dates, and booking details were valid at the time of publication.