Short answer
Since 16 October 2026, under a notification of the Civil Aviation Authority of Thailand (CAAT), airport staff may open a checked bag without the passenger present, but only when X-ray screening flags suspicious, prohibited or dangerous items. The search must be recorded and a notice of inspection left inside the bag. Power banks are the most common banned item found, and they belong in cabin baggage. CAAT advises TSA-approved locks, because other locks or zips may be broken without compensation.
What took effect on 16 October
A notification from the Civil Aviation Authority of Thailand (CAAT) on checked baggage took effect on 16 October 2026. Deputy Government Spokesperson Ploythalay Laksameesaengjan announced it that day, according to the Nation. Airport staff may now open a checked bag without the passenger present, but only when X-ray screening flags suspicious, prohibited or potentially dangerous items.
The inspection must happen in a designated area and be visually recorded, and staff must place a notice of inspection inside the bag. If prohibited items are found, staff may seize them and act under the law. The Nation says the approach follows aviation security practice in countries such as Singapore, Japan and South Korea.
What the rule does not allow
CAAT clarified on 25 October that officers cannot routinely open every bag, The Thaiger reported. Opening luggage outside designated areas or by unauthorised staff could be a legal offence. CAAT reviewed four social-media complaints about opened bags. Two were flights leaving Thailand where airport CCTV showed no inspection under the new rules, one was an arriving flight screened abroad, and only one, a domestic flight, was a search under the new procedure.
In that case officers had found a battery-powered device, and because the bag had no TSA-approved lock they cut its zip; a notice was left inside. Airlines remain responsible for checked luggage, so a passenger who finds damage or missing items should contact the airline first.
What to pack where
Power banks are the most common banned item found in checked bags since 16 October, CAAT said on 25 October. They belong in cabin baggage. Under CAAT's separate rules from earlier this year, The Thaiger reports, a passenger may carry up to two power banks, a device above 100 watt-hours needs airline approval up to 160 watt-hours, and power banks may not be used or charged in flight.
At Don Mueang, staff inspected 927 checked bags between 16 and 22 October and found 1,122 prohibited or non-compliant items, including power banks, lighters, electronic cigarettes and other battery-powered devices, The Thaiger reported on 26 October. CAAT advises TSA-approved locks, keeping valuables and documents out of checked bags, and photographing the contents and the outside of a bag at check-in.
Flying in for a tour day
The rule applies on domestic flights too, so it matters if you fly to Phuket for our Phi Phi and Maya Bay speedboat tour, from $75 per person. Nothing changes on the tour itself. Keep spare batteries and power banks in your cabin bag on the flight. For the boat day, our advice is a towel, swimwear, sunscreen, a dry bag for your phone and cash for the national park fee, which is 400 baht per adult and 200 per child on our tour.
If you are unsure whether an item may go in a checked bag, read your airline's list of prohibited items before you leave for the airport.
Practical checklist
- Put power banks and spare lithium batteries in your cabin bag, never in checked luggage.
- Use a TSA-approved lock so officers do not have to cut your zip.
- Photograph the contents and the outside of your bag at check-in, as CAAT advises.
- Keep valuables and documents in your cabin bag.
- Contact your airline first if a bag arrives damaged or something is missing.
Questions and answers
Can Thai airport staff open my checked bag without me?
Yes, since 16 October 2026, but only when X-ray screening flags suspicious or prohibited items. The search must be recorded and a notice of inspection left inside the bag. CAAT says officers cannot routinely open every bag.
What happens if my bag has no TSA lock?
Staff may break the lock or cut the zip to open a flagged bag, and the Nation reports that no compensation is paid for that damage. CAAT recommends TSA-approved locks.
Where do power banks go?
In the cabin bag. The Thaiger reports CAAT's rules: up to two power banks, airline approval for devices above 100 watt-hours up to 160, and no use or charging in flight.
Who do I contact if something is missing?
Your airline. CAAT said on 25 October that airlines remain responsible for checked luggage, and the airline can then investigate the matter with the relevant agencies.