Like Milwaukee's Best beer, Milwaukee's best choice for a low cost domestic carrier is AirTran. They are adding non-stop destinations from Milwaukee to the West Coast (Las Vegas, Seattle, Los Angeles, San Francisco, San Diego) as well as Phoenix. They are nonstop to Orlando and Tampa, as well as Baltimore. The service beats Midwest's Saver Service (which can only be expected to decline further now that they are effectively owned by Northwurst). Upgrades are cheaper. And the prices can't be beat.