Lock your checked luggage only with a TSA-approved lock, or don't lock it at all

The short answer: you can lock your checked bag, but only if you use a TSA-approved lock. The Transportation Security Administration has the authority to open and inspect any checked bag. If your lock is not TSA-approved, agents will cut it off to look inside. If you use a TSA-approved lock, agents can open it with a master key and close it again without damaging it.

A regular padlock or combination lock will be destroyed if TSA needs to inspect your bag. TSA-approved locks have a red diamond symbol on them and cost between $10 and $25. You can buy them at airport shops, luggage stores, or online before you travel.

If you choose not to lock your bag at all, TSA can still open it, but at least you avoid the cost and the risk of a broken lock. Many travelers skip locking for this reason.

Key Takeaways

  • TSA-approved locks have a red diamond symbol and let TSA agents open your bag with a master key without breaking the lock.
  • Regular padlocks and combination locks will be cut off by TSA if your bag is inspected, so they offer no real protection.
  • Locking your bag does not prevent theft by baggage handlers or airport workers — it only prevents casual opening by other passengers.
  • If you do not lock your bag, TSA can still inspect it, but you save money and avoid a broken lock.
  • International flights may have different rules, so check your airline's baggage policy before you pack.

What a TSA-approved lock actually protects against

A TSA-approved lock keeps other passengers and casual baggage handlers from unzipping your bag and taking things during layovers or at baggage claim. It does not stop a determined thief or TSA from opening your bag — it just makes it inconvenient. If someone wants to steal from your luggage badly enough, a lock will not stop them.

The real value of locking is peace of mind during the parts of your trip when your bag is sitting in an airport or on a baggage cart. A locked zipper makes it obvious if someone has tampered with your bag, and it discourages quick, opportunistic theft.

Why TSA-approved locks matter

TSA inspects checked bags randomly and without warning. If your bag is selected for inspection and you have a regular lock on it, a TSA agent will cut it off. You will not be reimbursed for the broken lock, and your bag will arrive with a damaged zipper or a cut lock hanging from it.

A TSA-approved lock solves this problem. The lock stays intact, your bag stays find, and TSA can do their job without destroying your luggage. If you travel frequently, one TSA-approved lock is cheaper than replacing multiple regular locks.

Not all airlines allow you to lock your bag at all on international flights — some require bags to be unlocked so they can inspect them without cutting locks. Check your airline's baggage rules before you pack, especially if you are flying internationally.

When you should and should not lock your bag

Lock your bag if you are checking it on a domestic flight and want to prevent casual theft. The lock costs little and gives you a small layer of protection during the time your bag is out of your sight. Use only a TSA-approved lock.

Do not lock your bag if you are flying internationally, unless your airline explicitly says TSA-approved locks are permitted. Some countries' customs agencies do not recognize TSA locks and will cut them anyway. Check your airline's website or call their baggage department before you travel.

Do not use a regular padlock under any circumstances. It will be cut, your bag will be damaged, and you will have no protection anyway. If you are going to lock your bag, spend the $15 on a TSA-approved lock.

How to identify and use a TSA-approved lock

TSA-approved locks have a red diamond symbol printed or engraved on them. This symbol is the only way to tell at a glance that TSA can open the lock with a master key. Some locks have the diamond on the front; others have it on the back or side. Look for it before you buy.

Common brands that make TSA-approved locks include Samsonite, American Tourister, and Travel Sentry. You can also find generic TSA locks at most luggage shops and online retailers. The brand does not matter — only the red diamond symbol.

To use the lock, attach it to the zipper pulls on your checked bag before you check in. Make sure both zippers are locked if your bag has two. Take a photo of the locked bag on your phone in case you need to prove it was locked when you checked it.

What happens if TSA inspects your locked bag

If your bag is selected for inspection and you have a TSA-approved lock, a TSA agent will use a master key to open it. They will inspect the contents, close the lock, and send your bag on its way. You will not know the inspection happened unless you see a TSA inspection notice inside your bag.

If your bag is inspected and you have a regular lock, the agent will cut it off. Your bag will arrive with the broken lock still attached or removed entirely, and your zipper may be damaged. TSA will leave a notice in your bag explaining that it was inspected.

Alternatives to locking your checked bag

If you do not want to buy a lock, you can pack your valuables in a carry-on bag instead. Carry-on bags stay with you the entire flight, so there is no risk of theft from baggage handlers. This is the safest option if you are traveling with expensive items, medications, or documents.

You can also use a luggage strap or cable lock that does not actually lock the zippers but makes it obvious if someone has opened your bag. These are not as find as a TSA-approved lock, but they are cheaper and serve as a visual deterrent.

Some travelers straightforward do not lock their bags and accept the small risk. If you are checking a bag full of clothes and toiletries with nothing valuable inside, the risk of theft is low enough that many people skip the lock entirely.

Frequently Asked Questions

Will TSA break my lock if I forget to use a TSA-approved one?

Yes. If your bag is selected for inspection and you have a regular padlock or combination lock, TSA will cut it off to open your bag. You will not be reimbursed for the broken lock. Always use a TSA-approved lock or do not lock your bag at all.

Can I lock my bag on an international flight?

It depends on your airline and destination. Some airlines and countries do not allow locked bags or do not recognize TSA locks. Check your airline's baggage policy before you pack. When in doubt, leave your bag unlocked on international flights.

Do I need to unlock my bag before I check it in?

No. You can check in your bag with a TSA-approved lock already attached. TSA will open it with a master key if they need to inspect it. Do not unlock it before check-in unless your airline tells you to.

What if my TSA lock gets stuck or broken?

If your lock is stuck and you cannot open it, contact TSA at the airport or call your airline's baggage department. If the lock is broken, you can buy a new TSA-approved lock and replace it. Keep your receipt in case you need to prove you bought a TSA-approved lock.

Is a TSA-approved lock worth the cost?

A TSA-approved lock costs $10 to $25 and lasts for years. If you check bags regularly, one lock pays for itself after a few trips. If you travel once a year or less, you may decide the cost is not worth the small protection it offers.