When are you going? Typically STL is cheaper. I have not looked for a while, but SWA is almost always cheaper than others and if it goes down after you buy but before your trip SWA gives you the difference back. I like Kansas City's airport better- of course it is only 35 minutes from my house! It really is an easy airport seperate from that. They have made it so the parking is easy, you can always park at the termainal, but the sattelite lots are now dedicated to whichever terminal you need. You just park at the lot that matches up and the shuttle goes straight to the terminal. . It is clearly marked for each airline.