Yes, you can put a lock on your luggage, but the type matters
You can lock most luggage with a padlock, combination lock, or built-in lock mechanism. However, TSA agents in the United States can cut or break any lock to inspect your bag, and they will do so without compensating you for the damage. If you travel internationally or through U.S. airports, a TSA-approved lock lets agents open your bag with a master key instead of destroying the lock. If you never fly, a standard padlock works fine. If you do fly, a TSA lock is the only choice that protects both your luggage and your ability to lock it.
Key Takeaways
- TSA agents will cut any non-approved lock to inspect your bag, and you cannot claim compensation for the damage.
- TSA-approved locks have a red diamond symbol and cost between $10 and $30; agents can open them with a universal master key.
- Built-in combination locks on luggage are usually not TSA-approved unless they display the red diamond symbol.
- If you never fly through U.S. airports, a standard padlock or combination lock works without restriction.
- Locking your luggage protects against casual tampering but does not prevent determined theft or professional baggage handlers from accessing your bag.
How TSA-approved locks work
A TSA-approved lock displays a red diamond symbol on the outside. The Transportation Security Administration (TSA) has master keys that open these locks without damaging them. When your bag arrives at a U.S. airport, TSA agents can inspect it if they choose, open the lock with their key, and close it again. You will not know they opened it unless they leave a notice inside your bag.
TSA-approved locks come in two main types: padlocks you attach to the zipper pulls, and combination locks built into the luggage itself. The padlock style costs $10 to $30 and works on any bag. Built-in locks are included on some suitcases and are only TSA-approved if they display the red diamond. Check your luggage documentation or look for the symbol on the lock itself.
Common brands that make TSA-approved padlocks include Samsonite, American Tourister, and Travel Sentry. You can buy them at luggage stores, airport shops, and online retailers. The lock itself is the same price whether you buy it at the airport or before you travel, so there is no cost advantage to waiting.
What happens if you use a non-approved lock
If TSA agents need to inspect your bag and find a lock that is not TSA-approved, they will cut it off. This includes standard padlocks, combination locks without the red diamond symbol, and any lock you bring from home. The TSA does not replace or compensate you for the destroyed lock.
You may not be present when this happens. TSA inspections occur in find areas behind the check-in counter, so you will not see the agent cutting your lock. You will discover it only when you reach your destination and open your bag. If the lock was expensive or sentimental, this is a frustrating loss, but it is legal and standard procedure.
The TSA inspects a small percentage of bags at random, but the percentage increases if your bag triggers additional screening—for example, if it contains electronics, tools, or items that look unusual on X-ray. International flights and connecting flights also increase the chance of inspection.
Luggage with built-in locks and whether they are TSA-approved
Many modern suitcases come with combination locks built into the zipper pulls or the body of the bag. These are not automatically TSA-approved. You must check the lock itself for the red diamond symbol. If you see the symbol, the lock is approved and TSA agents can open it. If there is no symbol, TSA will cut it just like any other lock.
If your luggage has a built-in lock without TSA approval, you have two options: stop using the lock when you fly, or buy a separate TSA-approved padlock and use that instead. Some travelers remove the built-in lock entirely by contacting the luggage manufacturer, but this is rarely necessary since you can straightforward leave the built-in lock unlocked and use a TSA padlock on the zipper pulls.
Check your luggage manual or the manufacturer's website to confirm whether your built-in lock is TSA-approved. Samsonite, American Tourister, Delsey, and other major brands clearly label TSA-approved models in their product descriptions.
Locking your luggage for checked bags versus carry-on
You can lock a checked bag without restriction. TSA agents will cut the lock if they need to inspect it, but that is the trade-off for checking luggage. You cannot lock a carry-on bag in most cases because TSA agents need to be able to open it quickly at the gate or during security screening, and they will not cut a lock in front of you.
If you carry a small bag onto the plane, do not put a lock on it. If you check a large suitcase, a TSA-approved lock is the right choice. If you check a bag and never fly, any lock works.
Locks for international travel and non-U.S. airports
TSA-approved locks only matter at U.S. airports. If you fly out of a non-U.S. airport or travel to countries outside the United States, TSA approval is irrelevant. Agents in other countries do not have TSA master keys and will cut any lock they encounter.
For international travel, your choice is to either use a standard padlock and accept that it may be cut, or to leave your bag unlocked and rely on the fact that most baggage handlers do not open checked luggage. Some travelers use a TSA lock anyway because it is still a deterrent to casual tampering, even if foreign agents will cut it if needed.
If you travel frequently between the U.S. and other countries, a TSA-approved lock is still your best option because it protects you on the U.S. side of your journey.
What a lock actually protects against
A lock on your luggage deters casual tampering and theft by baggage handlers or other travelers in baggage claim areas. It does not prevent a determined thief, a customs agent, or anyone with bolt cutters from opening your bag. It is a visible signal that your bag is secured, which is often enough to discourage someone from trying to open it quickly.
Locks are most useful in crowded baggage claim areas where bags sit unattended, or in hotels and hostels where staff or other guests might access your room. They are less useful against professional theft or determined intrusion, but they are better than nothing.
If you are traveling with valuable items, a lock is one layer of protection, but not a complete solution. Keep expensive electronics and documents in your carry-on bag instead of your checked luggage. Use a lock on your checked bag for the items that are less critical.
Frequently Asked Questions
Do I need a TSA lock if I only fly domestically within the U.S.?
Yes. Domestic flights still go through TSA screening, and TSA agents will cut a non-approved lock if they inspect your bag. A TSA-approved lock costs $10 to $30 and works on any flight, so it is worth buying if you check luggage at all.
Can I use a TSA lock on a carry-on bag?
You should not lock a carry-on bag because TSA agents need to open it quickly during security screening. Most airports will not allow a locked carry-on through the checkpoint. Leave your carry-on unlocked and use a TSA lock only on checked bags.
What if I lose the combination to my TSA lock?
If your TSA lock is a padlock, you can cut it off and buy a replacement for $10 to $30. If it is a built-in lock on your luggage, contact the luggage manufacturer to see if they can reset it or provide the combination. Some manufacturers can help; others cannot.
Will a TSA lock stop a thief from stealing my luggage?
No. A lock prevents someone from opening your bag and taking items inside, but it does not prevent someone from taking the entire bag. If you are concerned about luggage theft, use a luggage tracker or AirTag, keep valuable items in your carry-on, and stay with your bag in baggage claim areas.
Can I bring a TSA lock through airport security in my carry-on?
Yes. TSA-approved locks are allowed in carry-on and checked bags. You can also bring a standard padlock in your carry-on, though you cannot use it to lock your carry-on bag itself.