How to set a luggage lock
Nearly every luggage lock leaves the factory on 0-0-0 and nearly every one is set the same way. Here is the sequence, and the honest limit of what a lock buys you.
By Michael W. · Last updated October 11, 2026
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To set a luggage lock: open it on the factory code, which is almost always 0-0-0, hold the reset button or pin down, turn the dials to your new code, and release the button. On an integrated case lock the reset control is usually a small recessed pin or a button beside the dials; on a padlock it is a button on the body or the shackle itself held down in the open position.
Two things are worth knowing before you start. The first is that a three-dial combination has only 1,000 possibilities, so this is a deterrent against curiosity rather than a security device. The second is that every TSA-accepted lock can be opened by a screener with a master key - that is the entire point of the "TSA007" and similar markings, and it is why a TSA lock survives an inspection while an ordinary padlock gets cut off.
Set the code before the trip, not at the airport
Setting a lock takes thirty seconds at a kitchen table and is genuinely difficult at a check-in desk with a queue behind you. Set it, close it, open it twice to confirm, then write the code somewhere that is not the suitcase.
If you have forgotten the code
There is no recovery mechanism on a three-dial luggage lock. There is no manufacturer override and no code printed under the case. There are only three options, in order of how much they cost you:
- Work through the combinations. A three-dial lock has 1,000 of them and each attempt takes about two seconds. That is under an hour, and it genuinely works - start at 000 and go up.
- Feel for the gate. On many cheap locks, pulling gently on the shackle while turning each dial produces a slight catch at the correct digit. Do one dial at a time.
- Cut it off. A padlock takes bolt cutters. An integrated lock does not come off - the usual outcome there is a cut zipper and a case that still works as luggage but no longer locks.
The real fix is where you store the code
Put it in your phone's password manager under the suitcase's name, not on a sticky note in the lid pocket. A code written on anything inside the locked bag is no code at all.
What "TSA-approved" actually means
A TSA-accepted lock has a second keyway alongside the combination mechanism, which screeners open with a master key. Locks carry a code - TSA002, TSA007 and similar - identifying which master key fits.
The trade is explicit and worth stating plainly: a TSA lock is openable by anyone holding that master key, and those keys are not perfectly controlled. What you gain is that an inspection ends with your lock relocked rather than cut off. A non-TSA lock on a bag selected for inspection in the US is removed destructively, and the airline is not liable for it.
The honest limit of a luggage lock
A zipped suitcase can be opened in seconds by pushing a ballpoint pen through the zipper teeth and then zipping it closed again behind you - a lock on the sliders does not prevent that at all. A soft case can be cut. A cross strap can be cut. Nothing you buy for a checked bag is secure in any meaningful sense.
What a lock does well is stop opportunistic opening and keep the zipper closed. Everything that must not be lost belongs in the cabin instead, which is the whole argument in what not to pack in checked luggage. For the bag itself, a luggage strap does more for a failing zipper than a lock does, and a tracker does more about the likely failure.
Quick picks
The short list. Tap any row for the full write-up, including what each one is bad at.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 |  Samsonite Winfield 3 DLX Hardside Checked Spinner An integrated TSA-accepted combination, so there is no padlock to lose, cut or forget. | Checked bags on any itinerary | $167.89View on Amazon #ad Price as of October 10, 2026. How we’re funded |
| 2 |  Travelkin Cross Luggage Strap with TSA Lock A three-digit TSA combination at the junction of a cross strap, so it supports the zip as well as locking it. | Soft cases and bags with no built-in lock | $14.99View on Amazon #ad Price as of October 10, 2026. How we’re funded |
| 3 |  Apple AirTag A lock stops a hand. It does nothing about the far commoner problem, which is the bag not arriving. | iPhone users checking a bag | $89.00$99.0010% offView on Amazon #ad Price as of October 10, 2026. How we’re funded |
The case with the lock built into it
Samsonite Winfield 3 DLX Hardside Checked Spinner
A built-in lock is the format that actually gets used, because there is nothing to remember to bring. It is recessed into the shell so it cannot be levered the way a hanging padlock can, it is set with the same reset-and-dial sequence described below, and it is TSA-accepted so an inspection does not end with the lock in a bin. The polycarbonate shell is the other half of the argument for a bag that gets handled.
The specs that decide it
- Shell: Polycarbonate - rigid, water-resistant, does not transmit impact inside
- Security: Integrated TSA-accepted combination lock
- Setting it: Recessed reset pin beside the dials - same sequence as a padlock
- Cost: Several pounds of your 50 lb allowance, spent on the bag itself
Flaws but not dealbreakers
An integrated lock cannot be replaced. If the mechanism jams or the dials strip, you have a suitcase with a permanently locked zipper and no padlock to swap out - and the fix is usually cutting the zip. It also adds weight that comes out of your checked allowance.
#ad Price as of October 10, 2026. How we’re funded
The one that locks the case and holds the zipper shut
Travelkin Cross Luggage Strap with TSA Lock
If your case has no integrated lock, a strap with a lock at the junction does two jobs at once: the webbing takes the tension off a zipper that is trying to burst, and the combination at the centre deters the casual hand. It is set with the standard reset-and-dial sequence, and because it is TSA-accepted an inspector opens it rather than cutting the strap off.
The specs that decide it
- Webbing: 90.5 x 1.97 in total across both axes
- Fits: Cases from 18 to 32 in, on a slide buckle
- Lock: Three-digit TSA combination at the junction
- Extra: Tag slot built into the junction plate
Flaws but not dealbreakers
A cross strap is fiddly - it has to be fed around the case in two directions and re-seated every time the bag is opened, which is a real irritation on a trip with several stops. Three digits is also the weakest common format: it is there so the strap is not cut off, not to stop anybody determined.
#ad Price as of October 10, 2026. How we’re funded
The thing that tells you where the bag went
Apple AirTag
Almost nobody's checked bag is opened and robbed. A great many people's checked bags go to the wrong city. A tracker addresses the likely failure where a lock addresses the unlikely one, and the two cost about the same. If you are buying security for a checked bag, buy the one that matches the actual risk.
The specs that decide it
- Check before buying: They must have an iPhone. There is no Android app at all
- For Android: Buy a Google Find My Device tracker instead - see our tracker guide
- Nothing to add: Works out of the box, with no subscription
- Allowed: Permitted in checked baggage, unlike a power bank
Flaws but not dealbreakers
It needs an iPhone, and it has no GPS - it reports only where another Apple device last heard it, so it will usually tell you a bag's city rather than its belt. It also does nothing to stop anything; it only tells you where it happened.
#ad Price as of October 10, 2026. How we’re funded
Frequently asked questions
How do you set a luggage lock code?
What is the default code on a luggage lock?
How do you open a luggage lock when you have forgotten the combination?
Does a TSA lock stop a suitcase being opened?
Sources
Read next
- Best luggage straps
- What not to pack in checked luggage
- Best luggage trackers for Android
- Best luggage trackers
- If the airline loses your luggage
More in Airline Rules, or see every roundup and comparison on the site.