Does anyone know of any great discount airlines?

I've looked at Airtrans %26amp; ExpediaDoes anyone know of any great discount airlines?
a good site to buy cheap tickets is spirit airlines
Every time I check prices or buy tickets Southwest is always the best.Does anyone know of any great discount airlines?
try southwest airlines. you have to bring your own lunch, but it can be a lot cheaper.
US airways, hardly fly on time but cheap, same counts for easy jet.
Southwest is good. JetBlu is cheap but I think that they are the same company that was ValueJet. They just changed their name after the bad publicity they got from the crash years ago.