How to fly with firearms: TSA and airline rules

Flying with a legally owned firearm is permitted on US domestic flights — but only in checked baggage, in a locked hard-sided container you declare verbally at the counter. Federal civil penalties now reach $17,062 per violation if you skip that step. This guide covers every TSA rule, the container requirements, how to declare, airline differences, and what international travel looks like.

Is it legal to fly with a firearm in the United States?

Yes — US federal law permits transporting legally owned, unloaded firearms on domestic flights, but exclusively in checked baggage. Carry-on transport is prohibited with no exceptions. Both TSA rules and your individual airline's policy must be satisfied; the airline's rules often add requirements on top of the TSA baseline.

• Firearm must be unloaded
• Stored in a locked, hard-sided container
• Declared verbally to the airline at check-in
• Never placed in a carry-on bag or accessible cabin storage
• TSA locks (master-key padlocks) are federally prohibited on firearm cases

What container do you need for flying with a firearm?

The case must be hard-sided and lockable, fully enclosing the firearm so it cannot be accessed when closed. A dedicated gun case, a Pelican-style case, or any rigid lockable container qualifies. Critically, you must use your own padlock — TSA-approved locks with a master key are prohibited by federal law for firearm cases because agents may not open the case without the passenger present. Delta and United both require the locked gun case to be placed inside a standard checked bag rather than checked as a standalone item.

• Hard-sided only — no soft, padded, or fabric gun bags
• Locked with your own padlock (not a TSA master-key lock)
• Must fully enclose the firearm with no exterior protrusions
• Delta and United: gun case must go inside a standard checked bag
• Multiple locks are allowed and recommended

How do you declare a firearm at the airport?

Go to the airline's staffed check-in counter — not a kiosk, self-service bag drop, or curbside check-in — and say verbally: “I have a firearm to declare in my checked baggage.” The agent will provide a paper declaration tag that goes inside the locked case before it is closed. A TSA officer may then request to inspect the case; you must remain present, provide your key or combination, and re-lock the case after inspection before it enters the baggage system.

• Always use the manned check-in counter, never a kiosk
• Exact words: "I have a firearm to declare in my checked baggage"
• Declaration tag goes inside the locked case, not on the outside
• You must be present for any TSA inspection and re-lock afterward
• The airline retains the right to refuse transport if requirements are not met

What are the TSA rules for flying with ammunition?

Ammunition may travel in the same locked hard-sided case as the firearm, or in a separate hard-sided container — the key requirement is secure, hard-sided packaging. The passenger limit is 11 lbs (5 kg). Ammo must be in its original manufacturer's box or a container designed specifically for ammunition; loose rounds are not accepted. TSA also classifies a firearm as “loaded” — triggering a higher penalty tier — if both the firearm and its ammunition are simultaneously accessible to the passenger, even if the ammo is only in a jacket pocket.

• Maximum 11 lbs (5 kg) of ammunition per passenger
• Must be in original factory packaging or purpose-built ammo container
• Loose or improvised packaging rejected
• Black powder and percussion caps are prohibited in checked baggage
• Accessible ammo alongside a firearm = TSA's definition of 'loaded' (higher penalties apply)

How do airline firearm policies differ from TSA rules?

Every major US carrier follows TSA's baseline but layers on additional requirements, most commonly around container placement and firearms count. The table below summarizes the most significant carrier-level differences as of 2026. Always check your airline's current policy page before departure, as carriers can update rules between seasons. For full airline-by-airline details, see the airline guides hub.

What are the penalties for not declaring a firearm?

Failing to declare a firearm is a federal offense and one of the most penalized TSA violations. Civil penalties in 2026 are tiered and inflation-adjusted: an undeclared unloaded firearm draws $1,500–$6,130 per incident; a loaded firearm or one where ammunition is accessible alongside it draws $3,000–$12,210. The TSA maximum per violation is now $17,062 — significantly higher than the $10,000 figure that circulates in older guides. Repeat violations face escalating fines, and TSA may refer cases for criminal prosecution.

• $1,500–$6,130 per violation for undeclared unloaded firearm
• $3,000–$12,210 for loaded or accessible-ammo violation
• Maximum $17,062 per violation (2026 inflation-adjusted ceiling)
• Repeat violations draw escalating penalties above the standard range
• Criminal charges are possible in addition to civil fines
• Intentional concealment can result in arrest and confiscation

Can you fly internationally with a firearm?

International travel with firearms is substantially more complex than domestic travel. Most countries either prohibit civilian importation of firearms outright or require advance import permits, licenses, and sometimes a deposit or bond obtained through the destination country's consulate or embassy weeks before departure. US Customs and Border Protection (CBP) requires passengers to declare the firearm on re-entry to the United States. Popular destinations including Canada, Mexico, and most Caribbean nations enforce strict entry restrictions; hunters and competitive shooters should research destination rules at least two to three months in advance.

• Most countries prohibit civilian firearm importation without advance permits
• Research rules through the destination country's US consulate or embassy
• Declare to US CBP on re-entry using a CBP Form 4457 (registered before departure)
• Canada: strict; non-residents need a Non-Resident Firearm Declaration form
• Mexico: severe restrictions — undeclared firearms have led to tourist arrests
• Consider renting locally for international hunting trips to avoid import complexity

For a complete picture of what TSA allows and prohibits in carry-on and checked luggage, see what you can bring through airport security. If you're also traveling with oversized sports or hunting gear, the oversize and overweight baggage fees guide covers every carrier's charges. And to move through security faster on travel days, compare TSA PreCheck vs CLEAR.

Rules verified June 29, 2026. Sources: TSA firearms & ammunition, TSA civil enforcement, American Airlines. TSA penalty amounts are adjusted periodically; confirm current figures at tsa.gov before travel.