Jeju Airport's Carry-On Reminder — Plus the Packing Rules Divers Get Wrong

Jeju Airport ran a summer campaign on carry-on rules — liquids, power banks, lighters. Here's the rundown, plus how to pack dive gear for the flight.

배경조 (Bae Kyung Jo) Jul 9, 2026 · 2 min read

Jeju International Airport ran an aviation-security campaign on July 9, reminding travelers to check carry-on rules before heading to the airport. The point: summer crowds mean longer security lines, and checking your items in advance gets you through faster.

The key facts

The campaign: Korea Airports Corporation's Jeju Airport with the regional aviation office and airport police, during Korea's national Aviation Security Week (second year running)
Most-confused rules: liquid limits, power banks, and disposable lighters
How to check in advance: the Korean-language KakaoTalk chatbot "물어보안" or the Aviation Security 365 website (avsec365.or.kr)
Why now: peak summer traffic makes security queues longer — checking ahead speeds you through

What this means for divers and travelers

As an instructor who guides Beomseom dives daily, these are the items dive travelers actually get stopped for at Korean airport security:

Power banks, dive computers, dive lights: anything with a lithium battery is banned from checked luggage — carry it on board. Pack it in your suitcase and it gets flagged
Dive knives and line cutters: the opposite — banned from the cabin, checked luggage only
The easiest fix: come with no gear at all — every Nautilus Dive course includes full equipment rental, so a swimsuit and toiletries are all you need to pack

If you're unsure about an item, the Aviation Security 365 site (avsec365.or.kr) lets you search it before you fly.

FAQ

Do power banks go in carry-on or checked luggage?

Lithium-battery items including power banks are banned from checked luggage and must be carried into the cabin. The same applies to battery-powered dive gear like dive computers and dive lights.

Can I bring a dive knife on the plane?

Not in the cabin — dive knives and line cutters are only allowed in checked luggage. Any bladed dive tool must go in your checked bag.

Where can I check if an item is allowed in the cabin in Korea?

Search the item on the Aviation Security 365 website (avsec365.or.kr). During peak summer season security queues at Jeju Airport get long, so checking before departure is recommended.

Source: Headline Jeju