Bringing a gun on a private plane is legal in most situations, and the rules are looser than what commercial airline passengers deal with. The single biggest question is whether your flight is a genuinely private trip you or a friend are flying, or a paid charter. That distinction decides which federal laws touch your firearm, what the pilot can authorize, and what paperwork you need before wheels up. State law at every airport you touch matters too, sometimes more than the federal rules.
Part 91 Versus Part 135: Why the Type of Flight Matters
Federal aviation regulations split private flying into two categories that look similar from the outside but work very differently for firearms. Part 91 covers non-commercial private flights: owner-flown aircraft, flights with friends, personal use. Part 135 covers commercial charter and on-demand operations where a company is being paid to fly you somewhere.1eCFR. 14 CFR Part 135 – Operating Requirements: Commuter and On Demand Operations
On a Part 91 flight, the pilot-in-command is the final authority over what happens on board.2eCFR. 14 CFR 91.3 – Responsibility and Authority of the Pilot in Command If the pilot or aircraft owner is fine with a firearm on board, there is no TSA checkpoint to clear and no federal checked-baggage process to follow. A Part 135 charter is a commercial operation, run under a certificate with its own security program and potentially TSA oversight, and the rules start to resemble what commercial airlines require.
Firearms on a Purely Private (Part 91) Flight
The federal criminal statute on weapons aboard aircraft, 49 U.S.C. § 46505, prohibits carrying concealed weapons and loaded firearms on aircraft operating in “air transportation or intrastate air transportation.”3Office of the Law Revision Counsel. 49 USC 46505 – Carrying a Weapon or Explosive on an Aircraft Those are defined terms that refer to for-hire and commercial flights. A purely private Part 91 flight, where nobody is paying for the transportation, generally falls outside that definition, so the statute’s criminal prohibitions on concealed and loaded firearms do not apply the way they would on a commercial or charter aircraft.
In practice, on a Part 91 flight leaving a general aviation FBO, you can bring a firearm aboard with the pilot’s consent. It does not need to be unloaded and locked in a hard-sided case the way commercial baggage does. State law at the departure airport, any stop, and the destination governs whether you can legally possess the firearm on the ground. And the pilot retains absolute authority to refuse any item, for any reason.
Even without a legal requirement to case the gun, there are practical reasons to do it. An unsecured firearm in turbulence is a hazard. Many experienced private pilots prefer firearms to be cased in flight regardless of what the law says.
Firearms on a Charter (Part 135) Flight
Charter changes the picture. Because charter operators fly for hire, their flights count as “air transportation” under federal law, and 49 U.S.C. § 46505’s prohibitions on concealed weapons and loaded firearms apply.3Office of the Law Revision Counsel. 49 USC 46505 – Carrying a Weapon or Explosive on an Aircraft The statute does permit transporting an unloaded firearm in baggage that passengers cannot reach during flight, provided the operator has been told about it.
Charter companies also set their own firearms policies, and plenty of them will not accept guns at all. Where an operator does allow firearms, expect procedures that look like commercial airline rules: unloaded, locked in a hard-sided container, ammunition stored properly, and full disclosure at booking. TSA has also been tightening security screening for charter operators under its Twelve Five Standard Security Program, particularly on larger aircraft, which can add checkpoint-style screening even at private terminals.
Tell the charter company about the firearm when you book, not when you show up. Operators that aren’t set up to handle guns won’t improvise on departure day.
What Happens at the FBO
Most private flights leave from Fixed Base Operators, the general aviation terminals that serve as the private-flying equivalent of an airline gate. FBOs typically do not have metal detectors, X-ray machines, or TSA screeners. There is no sterile area to pass through and no counter where you formally declare a firearm.
The federal firearms rules for airports apply inside the sterile area beyond security screening in passenger terminals. At an FBO outside that sterile area, state and local law governs whether you can have a firearm in the lobby, on the ramp, and on the aircraft. Some FBOs also post their own rules banning firearms on the property, and those apply on top of state law.
Call the FBO ahead if you’re unsure. Front desk staff handle this constantly and can tell you whether they want the firearm cased before you walk in or have other restrictions.
State Laws Along Your Route
Federal permission to fly with a firearm does not override state firearms law at any airport you land at. You are responsible for the possession laws of every jurisdiction the aircraft touches, including unplanned diversions for weather or mechanical issues. States vary widely on which firearms and magazine capacities are legal, and a concealed carry permit from one state may mean nothing in another.
The Firearm Owners Protection Act, 18 U.S.C. § 926A, gives travelers a federal safe-passage right when moving firearms through restrictive states, but only if the firearm is unloaded, not readily accessible from the passenger compartment, and legal at both the origin and the final destination.4Office of the Law Revision Counsel. 18 USC 926A – Interstate Transportation of Firearms The protection covers transit, not extended stops. Land in a state where your firearm is illegal and spend the night, and the safe-passage defense may not save you.
Research every planned stop before departure. Keep your carry permits and registration documents accessible. If you have to make an unplanned stop, keep the firearm secured and your time on the ground short.
NFA Items Need ATF Approval First
Firearms regulated under the National Firearms Act require an extra step before crossing state lines by any means, including by air. Suppressors, short-barreled rifles, short-barreled shotguns, and machine guns cannot be transported interstate without prior ATF approval. The owner has to submit ATF Form 5320.20, the Application to Transport Interstate or Temporarily Export Certain National Firearms Act Firearms, and receive written approval before the trip.5Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or Temporarily Export Certain NFA Firearms – ATF F 5320.20
Processing times vary, so submit well ahead of your planned travel. Interstate transport of an NFA item without approval is a federal felony. The requirement applies whether your flight is Part 91 or Part 135, and whether or not the states along your route allow NFA items. The form specifies your route and dates, so last-minute itinerary changes create problems.
Flying Internationally With a Firearm
Taking a firearm out of the United States on a private aircraft involves both U.S. export controls and the destination country’s import laws. Neither is optional, and the paperwork happens before departure day.
The U.S. Side
Most travelers use License Exception BAG, which allows temporary export of personal firearms without a full export license. Under BAG, you can take up to three firearms and up to 1,000 rounds of ammunition per trip, provided the items are for personal use and will come back with you.6eCFR. 15 CFR 740.14 – Baggage (BAG) Before you leave, present the firearms to a CBP officer for inspection and complete CBP Form 4457, the Certificate of Registration for Personal Effects Taken Abroad. The officer signs and returns it. When you come back, present the signed form to prove you owned the firearms before the trip and avoid paying duty.7U.S. Customs and Border Protection. Temporarily Taking a Firearm or Ammunition Outside the United States for Personal Reasons
The Destination Country
Form 4457 only covers your re-entry into the United States. It is not an entry document anywhere else. Many countries ban private firearm importation entirely or require permits that take weeks. Contact the destination’s embassy or consulate well ahead of the trip. Arriving with an undeclared or prohibited firearm in a foreign country can mean confiscation, arrest, and prison sentences far harsher than U.S. penalties.
Penalties for Getting It Wrong
Consequences range from civil fines to federal prison, depending on what happened and where.
At a TSA checkpoint, bringing a firearm draws a civil penalty even when it’s an honest mistake. For a loaded firearm or one with accessible ammunition, first-offense fines run from $3,000 to $12,210, with a criminal referral. Unloaded firearms carry fines of $1,500 to $6,130, also with criminal referral. Repeat violations push the ceiling above $17,000.8Transportation Security Administration. Civil Enforcement For undeclared firearms found in checked baggage, TSA may issue a warning for a first-offense unloaded firearm but imposes fines of $850 to $3,410 for subsequent violations or loaded firearms.
Federal criminal penalties under 49 U.S.C. § 46505 are much steeper. Carrying a concealed weapon on an aircraft in air transportation carries up to 10 years in federal prison. Willful disregard for human safety pushes that to 20 years. If someone dies, the sentence can be life.3Office of the Law Revision Counsel. 49 USC 46505 – Carrying a Weapon or Explosive on an Aircraft
State penalties for illegal possession at your landing point are separate and stack on any federal consequences. A firearm that is perfectly legal where you took off can be a felony where you land, and not knowing the local law is not a defense.