Update: Some offers mentioned below are no longer available. View the current offers here.Frontier Airlines is having another one day sale today with flights starting at $20 from Chicago-O-Hare; Cincinnati, OH; Cleveland, OH; Denver, CO; Phoenix, AZ; Trenton/Princeton; and Washington-Dulles for select dates this January and February.Frontier is having a fare sale with flights from $20.15 each way.If you are interested in scoring any of these fares for $19, be sure to book sooner than later because during the past several sales that Frontier has offered, the fares usually sell out rather quickly.Fly from Chicago to Atlanta for $20 one-way.Tickets must be purchased by 11:59 pm Eastern time on Dec.31, 2014 for domestic, nonstop travel on select markets and dates from Jan. 6, 2015 through Feb. 11, 2015. If you are looking for a quick getaway this winter, you might want to take a look at some of these deals.While Frontier may not be a part of a major alliance and these cheap flights won’t help towards any major elite status, you can still bank extra credit card points by using a card that maximizes airfare purchases, like 3x on airfare with the American Express® Gold Card or 2x on the Chase Sapphire Preferred. Check out this post for more on maximizing airfare purchases.Report your success if you can actually snag any of these!Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.[card card-name=‘American Express® Gold Card’ card-id=‘22035076’ type=‘javascript’ bullet-id=‘1’]