Yes, zip ties are TSA-approved for use as luggage locks in 2026, though they come with practical caveats. The TSA does not prohibit the use of non-standard fasteners to secure your bags; however, if security officers need to inspect your luggage, they will simply snip the zip ties to gain access. Unlike TSA-approved Master Locks, which officers can open with a universal key and relock, zip ties cannot be replaced once cut. In 2026, many savvy travelers use bright-colored zip ties because they are an inexpensive way to deter casual "zipper-entry" theft and provide a visual "tamper-evident" sign—if the tie is missing or a different color upon arrival, you know the bag was opened. If you choose this method in 2026, it is highly recommended to pack a few extra ties inside the bag (and a small, blunt pair of nail clippers in an outer pocket) so you can re-secure the bag for your return journey or after a customs check.