Welcome to FlyerTalk, danny_sw.

Be aware that Frontier has been turning into one of those "budget" airlines (like Spirit) where the fares are cheap but you have to pay extra for things that are free on "mainstream" airlines. What exactly that is constantly changing, as Frontier is evolving from one of those "mainstream" airlines into one of those "budget" airlines.

And as JerryFF pointed out, they only tend to have one flight a day per city pair (if you're not based in Denver, at least). But besides that being an issue if you cancel, it can also be an issue if there's a problem (weather or equipment) that delays your first leg of the journey, since if you miss the connection you may have to wait a full day for the next connecting flight. (The longer your connection time in the connecting city is, the lesser this risk is. And of course it's the least risk if you happen to have a nonstop flight, but I doubt Cincinatti to Atlanta is one of those.)

There's a whole forum on FlyerTalk dedicated to Frontier:
and this thread might end up there eventually, btw.