Delta Air Lines is raising its fee for checking a second bag from $25 to $50 and is also raising fees for bags weighing more than 50 pounds and special items, including surfboards. Delta does not charge travelers for checking a first piece of luggage. "Fewer than 20 percent of our customers check a second bag. I would imagine that it would be even less for a third," said a Delta spokesperson. "It's still a good value when compared with shipping or luggage services."