(Cincinnati) It set up shop at the Cincinnati Northern Kentucky International Airport just last May. Now Frontier Airlines is announcing it's adding four new flights a week.

The discount carrier will begin the non-stop flights to Washington D.C.  beginning in September.

It's the third announced expansion for Frontier since it became Cincinnati's first discount carrier since the late 1990s. It currently offers a daily non-stop flight to Denver and three non-stop flights a week to Trenton, New Jersey.