Helpful tip: even though a flight to Memphis is barely longer than one to Nashville, they tend to be a good bit more expensive. My theory is that since Southwest doesn't fly directly from here to Memphis, the other airlines don't feel the need to compete as much.

I have bought round-trip airfare to BNA for under $200 before from Southwest, but the best Memphis rates I can remember have all been over $200 and sometimes closer to $270. It's been a while, though, so this may have changed; still, I'd suggest you look at tickets early if you decide to go.