You can take a firearm in your luggage, all ammo must be in original factory boxes and in a SEPERATE luggage container...the gun must be unloaded and most carriers specify that it must be in a LOCKED case, but not all. Hawaii is a state, you can bring a gun here but you are supposed to register it with the PD within 48 hrs of arriving, however how will they ever know....I would be careful....if you are staying in a hotel keep it locked in your suitcase....the laws here are strict.....you can keep it in your residence or your place of business or in the trunk to and from the range or hunting. any more questions email me....you are probably already in bed and this post is too late......good luck.