Hi Viluvsdisney,
Would suggest you check Orbitz daily and also Fronter's website daily.
You didn't say when you're going but if you're willing to change planes somewhere, you can maybe catch Airtran, Delta, American at about 200 per person.
I caught a Frontier one day sale a couple of months ago--right when Fairytale package came out--for 276 nonstop per person and that's the best I've seen on the nonstops (frontier & United). We got a little break in that I'm traveling with DM. She gets a Sr. fare and one companion as well. So that brought two of our 3 tickets down to 250. With traveling with DM, unless the fare is like $100 cheaper, I'm not willing to do a connection. Mom moves to slow to fly thru airports to connections.
Nice to see another Colorado person on the boards! There aren't many of us....Good luck! Sharon