As of May 5, five of the six U.S. legacy airlines will begin
charging $25 for a second checked bag on economy-class, domestic
tickets. These carriers are United, Continental, Delta, Northwest
and US Airways. American is the only legacy airline to allow two
free pieces of checked luggage. Budget airline AirTran has also
announced it will begin charging $10 for a second bag on May 15.
United also is raising the fee to change a ticket from $100 to