best rates from Louisville or Nashville at end of May

[SqueakyMouse]

We were planning on driving to WDW at the end of May for our big, annual family get-together; but now dh has to work during those dates. Now, I'm considering flying down with just the oldest of my 3 children. What's the best rate anyone has gotten flying out of either Louisville or Nashville at the end of May and returning the first week in June? Yesterday, I could book Nashville to Orlando on SW for $49, but the return rates were HORRIBLE. Today, I can get $59 each way with a selection of times and dates. However, with taxes and other charges, this is not the best deal we've gotten over the past year.