Deal Alert: $21 One-Way Flights on Frontier
Update: Some offers mentioned below are no longer available. View the current offers here.
Frontier Airlines is having a sale in honor of its 21st birthday, with one-way flights starting at $21. This deal includes routes from Atlanta, GA; Chicago- O'Hare, IL; Denver, CO; Dallas-Ft. Worth, TX; Philadelphia, PA and more for select dates beginning in August. The promotion runs today through 11:59pm tonight, June 30, 2015.

If you're looking for a quick getaway this fall, you might want to give the sale a look. Just be sure to book sooner than later, as fares have sold out rather quickly during the past several Frontier promotions.

Tickets must be purchased by 11:59pm Eastern time tonight for domestic, nonstop travel on select dates between August 22 and December 16, 2015.
Maximize Your Spending
While Frontier may not be a part of a major alliance and these cheap flights won't help toward any major elite status, you can still earn extra credit card points by using a card that maximizes airfare purchases, like 3x on airfare with the American Express Premier Rewards Gold or 2x on the Chase Sapphire Preferred. Check out this post for more on maximizing airfare purchases.
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