Essentially the fares are for travel through June 26, then from August 26-October 6. I'm guessing they don't need to push seats during the peak summer season just yet!
I'd list some sample fares, but there are seriously thousands of them. I'll tell you that some are pretty amazing, but some are not. You'll have to do some shopping to figure out which destinations are the best. From what I'm seeing Atlanta, Las Vegas, Phoenix, Denver, and California cities have the best flight deals.
Click here to see the full list of fares at Southwest Airlines.
Click here to see the full list of fares at AirTran Airways.