Cabin bags are packed around one question: what you cannot afford to lose
Checked luggage is sometimes late, lost, or sent somewhere else entirely. Your cabin bag is the buffer for that: documents, money, medication, devices and enough to get through a day or two. Everything else is a question of comfort in the air.
Size, weight and piece rules differ between airlines and change over time — on low-cost carriers they differ between fare types of the same airline. Check your own airline’s rules before packing: it is the only way not to pay at the gate.
What always travels in the cabin
| Category | Why not in the hold |
|---|---|
| Documents and money | Nothing can be solved without them |
| Medication you take | Finding a pharmacy abroad takes time |
| Devices and power banks | Lithium batteries are normally banned from the hold |
| House and car keys | They cannot be replaced while travelling |
| A change of underwear and a t-shirt | Your only insurance against delayed luggage |
| Glasses, lenses and solution | Hard to replace in an unfamiliar city |
Most carriers forbid power banks and spare lithium batteries in checked luggage — a fire-safety rule, not a convenience one. Check your airline’s capacity limits.
Liquids and the things that get confiscated
Liquid rules for cabin bags apply in most airports and differ in the details. Typically liquids, gels and aerosols travel in small containers in a transparent bag, with medication and baby food as a declared exception. Confirm your airport’s current rules in advance.
Check anything sharp separately: nail scissors, a multitool, a corkscrew. What you carry every day at home often becomes a problem at security.
Packing for comfort in the air
Put whatever you will reach for first in an outside pocket: documents, headphones, charger, water bought after security. Keep something warm on top — cabins are almost always cooler than people expect. Collect everything you need in flight into a small pouch so you are not pulling the case down from the locker.
Flying with children
With a child the cabin bag becomes the main bag: snacks, water, a change of clothes, wipes, a familiar toy and something to keep their hands busy. Pack it so that everything can be reached with one hand without waking the row.
When the bag is ready
Documents and money in the cabin, medication with you, devices and power bank out of the hold, liquids within the rules, sharp items checked, a change of clothes and something warm packed, and everything for the flight on top. Size and weight checked against your own fare.
