The fee to check a second bag for domestic flights will rise from $25 to $50, and fees for items that require special handling -- such as surfboards or ski equipment -- also will increase on domestic and international flights.

These changes will apply to tickets bought on or after July 31 for travel on or after August 5.

Delta said its First Class, Business Elite and Medallion customers will still be able to check up to three bags at no charge and customers on international flights can check a first and second bag at no charge.