Alitalia's sale features flights to Paris, Rome, Venice, and Athens. Many of the sale fares are the best currently available.
AirTran's new sale is valid through Wednesday at 11:59 p.m. ET. Destinations include New York, Miami, Charlotte, and Orlando.
Southwest's sale includes flights to Chicago, Las Vegas, and Washington, D.C., during the "dead weeks" between Thanksgiving and Christmas.
