Extended through Sunday, Frontier Airlines via ShermansTravel discounts last minute Frontier Airlines 1-Way Fares Nationwide with prices starting at $21.10. (On the ShermansTravel landing page, click on "FlyFrontier.com" in the main paragraph; on the following page select "Sale" on the "Sale Name" drop down menu.) That's tied with yesterday's expired mention as the lowest price we could find for select routes by at least $5. This price is valid for flights departing from Atlanta, GA, (ATL) with arrival in Orlando, FL, (MCO) on September 22. This sale includes flights to Las Vegas, NV, (LAS); Austin, TX, (AUS); New York, NY, (LGA); Atlanta, GA, (ATL); and more. Book this travel deal by September 18 for flights from September 20 through October 31.

All prices, dates, and booking details were valid at the time of publication.