Luggage Lock Buying Guide (2027)

A lock on a checked bag that screeners cannot open with a master key will be cut off, which wastes the purchase and leaves the bag unlocked for the rest of the journey. Buy TSA-accepted locks, look for the red diamond Travel Sentry mark, and keep the lock in working order. An inspection indicator is a useful second layer: it tells you afterwards that an inspection happened, so you can check contents before leaving the airport.

A shackle lock is neater on hard cases and fixed hasps, but it needs a pull with enough clearance for a rigid steel loop. A cable lock threads through slim pulls, fabric loops and hasps that reject a shackle, and a long cable can join two distant pulls with one lock. The deciding test is physical: try the lock on the actual bag before travel. If a shackle will not thread, a cable lock is not a compromise, it is the correct buy.

A 3-digit combination gives 1,000 codes and a 4-digit combination gives 10,000, but both are deterrents against casual opening, not barriers to a thief with tools. The practical choice is about failure mode: combination locks fail when a code is forgotten, keyed locks fail when a key is lost, and dual-opening locks fail only when both happen. Choose the failure mode you are least likely to commit, and keep the code or key somewhere other than the bag being locked.

Singles suit one-bag travellers and replacements. Two packs suit couples. Four packs suit families and multi-bag travellers, and six packs suit households that travel together. Count honestly, including backpacks and gym bags that get locked in hostels, because a pack that leaves one bag unlocked is a pack bought twice. Colour coding across a pack also ends the nightly question of whose lock is whose.

No lock in this guide stops a determined thief with cutters and time, and no lock should hold valuables on a checked bag: passports, electronics, jewellery and medication belong in a carry-on. A luggage lock deters casual opening, keeps zippers shut in transit, and survives inspection. Judged on that job, a well-fitting, TSA-accepted lock is worth its small cost on every checked bag. Judged as a safe, every luggage lock fails, and no honest guide should pretend otherwise.