Magnets are allowed through TSA security and on planes, but with restrictions that depend on the magnet's strength and type

Small, weak magnets like those on refrigerators or in toys pass through security without issue. Stronger magnets—particularly neodymium magnets and other rare-earth magnets used in industrial equipment, speakers, or scientific instruments—face real restrictions. The TSA does not ban magnets outright, but the Federal Aviation Administration (FAA) has rules about how strong they can be and how they must be packaged if you're checking them in luggage.

The core rule: magnets cannot interfere with aircraft navigation or safety systems. If a magnet is powerful enough to affect compass readings or electronic equipment from several feet away, it will not be allowed. For carry-on bags, the restriction is stricter than for checked luggage because the magnet sits closer to the cockpit.

Key Takeaways

  • Weak magnets (refrigerator magnets, small craft magnets) go through security and on planes with no restrictions.
  • Strong neodymium and rare-earth magnets must be declared and may be prohibited in carry-on bags, though checked luggage rules are less strict.
  • The TSA screens magnets at security; the FAA enforces rules once you board, so a magnet that passes TSA may still be rejected at the gate.
  • If you are unsure whether your magnet qualifies as "strong," contact your airline before you travel rather than discovering the restriction at the airport.

Why the FAA restricts magnets on aircraft

Aircraft rely on magnetic compasses and electronic navigation systems to stay on course. A sufficiently powerful magnet can interfere with these instruments, creating a safety hazard. The FAA's concern is not theoretical—strong magnets have caused navigation errors on other vehicles, and the agency treats aircraft navigation as non-negotiable.

The restriction applies differently to carry-on and checked baggage because carry-on bags sit in the cabin, much closer to the flight deck. A magnet in an overhead bin poses a greater risk than the same magnet in the cargo hold, which is why airlines are more permissive with checked luggage.

What counts as a "strong" magnet that airlines will restrict

The FAA does not publish a single threshold in gauss or tesla that divides allowed from prohibited magnets. Instead, airlines use their own policies, which typically reference the magnet's ability to affect navigation equipment. Most carriers prohibit magnets stronger than about 5,000 gauss in carry-on bags, though some are stricter.

Neodymium magnets (also called rare-earth magnets) are the most commonly restricted type because they are extremely strong relative to their size. A neodymium magnet the size of a coin can easily exceed 5,000 gauss. Electromagnets, permanent magnets in industrial motors, and magnets used in MRI machines or scientific equipment are also frequently prohibited.

Weak magnets—those found in toys, on refrigerators, in craft supplies, or in small consumer electronics—are almost never restricted because they cannot interfere with aircraft systems.

TSA screening versus airline policy

The TSA does not have a blanket ban on magnets. At the security checkpoint, TSA officers screen magnets the same way they screen other items: they look for weapons or explosives. A magnet by itself is neither, so it will pass through the X-ray machine and metal detector without triggering an alarm (magnets do not set off metal detectors in the way ferrous metal does).

However, passing TSA security does not mean the magnet is cleared for the flight. The FAA rules are separate, and your airline enforces them at the gate or during baggage check-in. You can pass through security with a strong magnet and still be told you cannot bring it on the plane. This is a common source of confusion and frustration.

How to pack magnets if they are allowed

If your airline permits the magnet in checked luggage, the FAA requires it to be packaged so it cannot move around or come into contact with metal objects during flight. Wrap the magnet in non-magnetic material (cloth, plastic, or foam) and place it in a rigid container or padded box. Do not pack it loosely in a suitcase where it could shift during turbulence.

For carry-on bags, the same principle applies: the magnet should be in a protective case or wrapped securely. This protects both the magnet (which can crack if it strikes metal) and the aircraft equipment.

What to do before you travel with a magnet

Contact your airline directly before you pack. Call the customer service number on your ticket or visit the airline's website and search for "magnet policy" or "restricted items." Have the magnet's specifications ready—the strength in gauss or tesla, the type (neodymium, ceramic, electromagnet), and its intended use. Some airlines have online chat support and can give you an answer in minutes.

If the airline says no, you have a few options: ship the magnet to your destination instead, purchase a replacement magnet at your destination, or leave it at home. Attempting to sneak a prohibited magnet through security or onto a plane is not worth the risk of confiscation, a fine, or being banned from the airline.

Magnets in checked luggage versus carry-on

Checked luggage rules are more lenient because the cargo hold is farther from the flight deck and navigation systems. Some airlines that prohibit strong magnets in carry-on bags will allow them in checked luggage if they are properly packaged. This is your best option if you need to travel with a strong magnet.

Always declare the magnet when you check your bag. Do not hide it or hope it goes unnoticed. Baggage handlers and TSA screeners may open your bag for inspection, and a magnet that was not declared could result in your bag being held or confiscated.

Frequently Asked Questions

Will a magnet set off the metal detector at TSA security?

No. Magnets do not trigger metal detectors the way ferrous metals (iron, steel) do. Your magnet will pass through the detector without an alarm. However, it may show up on the X-ray machine, and TSA officers may ask what it is.

Can I bring a magnet on a plane if it passed through TSA security?

Not necessarily. TSA security and FAA flight rules are separate. A magnet that passes TSA screening may still be prohibited by your airline under FAA rules. Always check with your airline before you travel, even if you have flown with the magnet before.

What happens if I try to bring a prohibited magnet on a plane?

The airline will confiscate it at the gate or during baggage check-in. You will not be allowed to bring it on board, and you will not be refunded. In rare cases, attempting to bring a prohibited item onto a plane can result in a fine or being banned from the airline.

Are refrigerator magnets allowed on planes?

Yes. Refrigerator magnets are weak and pose no risk to aircraft navigation systems. They pass through TSA security and are permitted on planes by all major airlines.

Can I mail a magnet if the airline won't allow it?

Yes. The U.S. Postal Service and most shipping carriers allow magnets to be mailed, though they may require special packaging or labeling depending on the magnet's strength. Contact the carrier for their specific magnet policy before you ship.