Virgin America's latest offering features travel to key destinations including Boston, Los Angeles, Ft. Lauderdale, Las Vegas, San Francisco, and Washington, D.C. AirTran, Delta, Midwest, Northwest, United, and US Airways compete.
Delta's latest sale, a carbon copy of United's and very similar to Southwest's and American's, is offering winter travel to many domestic destinations. The aforementioned offer competition, as do AirTran, Frontier, US Airways, and more.