Frontier Airlines is adding routes from Atlanta to Miami, Austin and Indianapolis starting in March.

The Denver-based ultra low-cost carrier on Wednesday offered a one-day sale with $19 one-way fares from Atlanta and a $49 one-way fare sale through Jan. 24, with various restrictions.

The new flights on Airbus A319 and A320 jets will launch March 6. The routes will add to Frontier’s existing service from Atlanta to Chicago, Cleveland, Denver, Las Vegas, Philadelphia, Orlando, Trenton and Washington, D.C.