When locking your luggage, it's important to only use TSA approved locks. Otherwise, don't be surprised when the lock is gone upon arrival, and there's a note inside your bag informing you that your lock was cut off by airport security agents for inspection.

You are legally allowed to put a non-TSA lock on your checked luggage, but it is not recommended for air travel. If your bag is selected for a random physical inspection by the TSA or other security agencies, and they cannot open your lock with their master keys, they are authorized to cut or break the lock to gain entry. The TSA is not liable for the damage caused to your lock or your suitcase during this process. In 2026, it is far more efficient to use a TSA-approved lock (marked with the "Red Diamond" logo), which allows security officers to open and re-lock your bag without damage. If you use a non-TSA lock and it is cut, you may find your bag arriving at its destination unsecured, which increases the risk of theft or items falling out during transit. For those seeking extra security without a TSA lock, many travelers now opt for heavy-duty "zip ties," which can be easily cut by security and replaced by the owner upon arrival, though this still leaves the bag vulnerable during the flight.