Frontier is having another one of their $39 fare sales right now. You can book 1-way flights on Frontier Airlines for just $39 each way through tonight, June 5, 2015, at 11:59 pm Eastern Time. For this sale you must travel from June 13, 2015, to October 20, 2015, (Fridays and Sundays excluded). I checked deals out of Atlanta and was able to find $39 fares one-way to Miami, Orlando, New Orleans, Cincinnati, Phillie, Indianapolis and Cleveland. Make sure you book before the sale ends tonight.
Frontier $39/ One Way Fare Sale Ends Tonight