Unload weapons prior to packing. Delta Airlines and the TSA require that all ammunition is removed from weapons and packaged in fiber (cardboard or wood) designed to carry ammunition. Ammunition may be packed in the same case as the weapon.
Pack weapons in a hard-sided case. Up to four rifles and shotguns may be packed in the same case, and up to five handguns are permitted in one case. Cases carrying more than two rifles or shotguns will be assessed an excess baggage fee.
Lock the hard-sided case securely and check for breach points. The TSA defines a locked container as "one that completely secures the firearm from access by anyone other than you." If a case can be easily opened without a key or knowledge of the lock combination, the TSA and Delta Airlines will refuse to check it.
Inform ticket counter attendants that you are checking a weapon. TSA regulations require that all passengers with weapons must notify clerks and ticket counter attendants before checking in for a flight.
Surrender the case containing the weapon and the key, if available, to the ticket counter agent. The ticket counter agent may request that a TSA security officer inspect your weapon case and its contents.
Lock and secure the weapon after it has been inspected. After approval, the ticket counter agent will check your bag according to normal Delta Airlines procedures.