What you pack in a carry-on should protect the trip from the problems checked luggage cannot solve: documents, medication, batteries, valuables and the first 24 hours.
For a trip-specific checklist that adjusts for duration, climate, luggage type and activities, build your version with the travel packing list generator.
Keep identification, travel documents, payment methods, prescription medicine, medical devices, electronics, spare batteries, chargers and valuables in the cabin. Add one change of clothing, basic toiletries, glasses or contact supplies and any arrival-specific item such as a swimsuit or meeting outfit. Place in-flight items in the personal item under the seat; an overhead carry-on is not reliably accessible during every phase of the flight.
Carry-on packing list
Never check these essentials
- Passport or ID, visas, boarding details and destination address
- Wallet, cards, emergency cash and travel-insurance information
- Prescription medication and required documentation
- Essential medical devices and supplies
- Phone, laptop, camera, e-reader and chargers
- Power banks, spare lithium batteries and other items the operator requires in the cabin
- Keys, jewelry and irreplaceable valuables
- Glasses or contact-lens essentials
First-night backup
- One change of underwear, socks and a versatile outfit
- Toothbrush, toothpaste and deodorant
- Small skin-care and personal-care essentials
- Period products if needed
- Destination-specific first-day item
- Light layer suitable for the cabin and arrival weather
Under-seat flight pouch
- Headphones, charging cable and permitted power bank
- Medication needed during the flight
- Water bottle filled after security
- Compact snack
- Lip balm, tissues and hand sanitizer
- Eye mask and earplugs for an overnight flight
- Pen where arrival forms may still require one
Personal item vs. carry-on suitcase
The personal item belongs under the seat and should hold everything needed during the flight and anything that must remain with you if the overhead bag is gate-checked. The carry-on suitcase can hold ordinary clothing, shoes and the remainder of the toiletry kit. Airline dimensions and allowances differ, including by fare and aircraft, so measure both bags against the operating carrier’s current rules.
Do not put every critical item in the overhead case. Boarding groups may run out of bin space, and regional aircraft may require larger cabin bags to be checked at the gate. Move documents, medication, batteries, valuables and one basic clothing change into the personal item before reaching the aircraft door.
Follow liquids and battery rules for the exact route
At standard U.S. checkpoints, TSA’s 3-1-1 rule generally limits carry-on liquids, gels, aerosols, creams and pastes to containers of 3.4 ounces (100 milliliters) or less inside one quart-size bag, with exemptions and separate procedures for certain medically necessary items. Other countries and airports may use different rules or screening technology. Check every departure and connection, not only the first airport.
Power banks and spare lithium batteries generally belong in the cabin, with capacity, quantity and protection requirements set by regulators and carriers. Never place a battery where terminals can short-circuit, and ask the airline about unusually large batteries or medical equipment. Rules change faster than packing-list graphics do.
Pack for a delayed bag without duplicating the suitcase
One versatile outfit, underwear, essential toiletries and destination-critical clothing are enough for most backups. A beach traveler may add swimwear; a business traveler should carry one complete meeting outfit; a cold-weather arrival needs the actual coat. Build around consequences rather than trying to recreate the whole checked bag.
Keep medication for the full journey in the cabin, plus an appropriate delay buffer when permitted and medically advised. The travel essentials for women guide covers period care and personal health in more detail, while the travel toiletries list helps keep liquids compact.
How to pack a carry-on for international travel
Add entry documents, destination and transit addresses, a suitable plug adapter, offline maps, mobile-data access and any required medication paperwork. Keep a payment backup separate from the main wallet. Download essential information before departure in case airport Wi-Fi and a tired phone decide not to cooperate at the same time.
For Europe, use the dedicated Europe packing list for rail transfers, walking shoes and seasonal variation. For longer flights, the long-haul flight essentials page focuses on comfort without turning the under-seat area into storage furniture.
What not to pack in a carry-on
Security rules vary, but common restricted categories include weapons, many sharp objects, flammables, explosives, certain tools and liquids outside the applicable allowance. Sporting equipment and self-defense items may require checked baggage or may be prohibited entirely. Use official security and airline databases for the exact object and route rather than a generic list.
Also leave out dense duplicates, full-size toiletries and “comfort” items that prevent the bag from fitting its size limit. A carry-on that must be forced closed has already lost some of its flexibility.
Frequently asked questions
What should always be in your carry-on?
Always carry documents, payment methods, medication, medical devices, valuables, batteries, electronics and the basics needed for the first night. Put the most critical items in the personal item in case the overhead bag is gate-checked.
What goes in a carry-on vs. checked bag?
The carry-on protects identity, health, valuables, batteries and arrival resilience. The checked bag can hold replaceable clothing, larger permitted liquids and items unsuitable for the cabin, subject to security and airline rules.
A useful carry-on is less about filling every inch than controlling failure. If the overhead case disappears at the gate, the bag under the seat should still let you enter the country, take medication, pay for transport and manage the first night.
Editorial note: Security, battery, medication and baggage rules change. Verify the exact item with official airport, regulator and operating-airline guidance before departure.