You've done it. Paid to check a bag, lost it for three days in Frankfurt, and stood at the luggage carousel in Stockholm watching your suitcase-less future unfold. Or maybe you overpacked so badly that walking from your gate to the taxi rank felt like a punishment. Either way: there's a better system, and it fits in a 40-liter bag.

This is the complete international travel packing list — built around carry-on only travel, tested across climates from Patagonia to Southeast Asia. No filler. No items that "could be useful." Just the stuff that actually earns its weight.

The Carry-On First Principle

The single biggest packing mistake isn't overpacking a specific category. It's starting with a large bag and filling it. Start with a 40L bag as your hard constraint, then pack to fit.

Approved carry-on dimensions (2026):

Most airlines: 22 × 14 × 9 inches (56 × 36 × 23 cm)
Budget European carriers (Ryanair, EasyJet): 55 × 40 × 20 cm with stricter enforcement
US domestic: Generally 45 linear inches total

The 40L bag is your target. Bags that work: Osprey Farpoint 40, Peak Design Travel Backpack 45L (compresses to carry-on size), Tortuga Setout 45L, NOMATIC 40L. Expect to spend $150–$350 for a quality travel pack that lasts years.

Clothing: The 5-4-3-2-1 System

The most battle-tested framework for international packing:

Item	Count	Notes
T-shirts / tops	5	2 versatile, 1 nicer, 2 backup
Underwear	5	Merino wool if budget allows
Socks	4	2 regular, 2 hiking/warm
Bottoms (pants/shorts)	3	1 nice, 1 casual, 1 sport/swim
Long-sleeve / mid-layer	2	One can double as pajamas
Outer layer	1	Packable down or rain shell

The merino wool argument: Merino wool clothing (Icebreaker, Smartwool, Uniqlo merino) doesn't smell after a day of wearing, dries in a few hours, and looks presentable in most restaurants. One merino t-shirt can pull 3 days of wear before needing a wash. The upfront cost ($40–$90/shirt) pays for itself within two trips when you're checking fewer bags and doing less laundry.

The shoe rule: Three pairs maximum. Wear the heaviest on travel days.

Shoe Type	Best Option	Weight
Walking / everyday	Allbirds, Veja, New Balance 574	~400g
Hiking / versatile	Merrell Moab Speed, Salomon Predict	~450g
Dress/evening	Packable loafers or collapsible flats	~250g

Documents and Money

Never pack documents in checked luggage. Never check a bag that carries your passport.

Physical items:

Passport (valid at least 6 months beyond travel dates — check this NOW)
Physical copies of visa letters, hotel confirmations for arrival countries
Travel insurance card and emergency contact number
Two credit/debit cards from different banks
Local currency for the first 24 hours ($50–$100 equivalent)
RFID-blocking wallet or card sleeve

Digital backup (non-negotiable):

Passport photo scan saved to cloud storage AND emailed to yourself
Travel insurance policy number and emergency line
Hotel addresses in offline maps (Google Maps offline, Maps.me, or OsmAnd)
All flight confirmation numbers downloaded

The two-card rule: Keep one card in your wallet, one in your bag's hidden pocket. Getting pickpocketed in Barcelona shouldn't end your trip — it should just mean you walk to the nearest ATM with the backup card.

Electronics and Tech

Must-Have

Unlocked smartphone with downloaded offline maps for your destination
Universal travel adapter (BESTEK and Ceptics are reliable; $15–$30) — covers 150+ countries
Portable battery (power bank) — 10,000mAh for 2–3 phone charges; 20,000mAh if you carry a laptop. Anker is the go-to brand.
USB-C charging cable × 2 (they break)
Noise-canceling earbuds or headphones — Sony WF-1000XM5, Bose QuietComfort, or Apple AirPods Pro
E-reader if you read regularly (Kindle Paperwhite is the standard)

Situational

Laptop — Skip if your trip is pure travel/leisure and your phone can handle navigation and communication. Carry if you're a digital nomad or need to work.
Camera — Only if photography is a real priority. Modern smartphone cameras (iPhone 15 Pro, Pixel 9 Pro) are genuinely excellent for travel.
Travel router — Useful for long-stay destinations or remote work. GL.iNet GL-MT3000 is compact ($70).

Leave Behind

Power strip (security flags it constantly)
Laptop if you don't actually need it
Tablet + phone + laptop (pick two)
Cheap earbuds you'll lose anyway

Toiletries: The 100ml Rule and Beyond

Core toiletry list for carry-on:

Item	TSA Note	Brand Tip
Shampoo / conditioner	Under 100ml each	Buy solid bars (Ethique, Lush)
Body wash or soap bar	Bar passes freely	Dr. Bronner's castile soap
Toothbrush + toothpaste	Mini paste = fine	Bite toothpaste tablets (TSA-clear)
Deodorant	Solid stick is easiest	Salt crystal deodorant = no limits
Sunscreen SPF 50	Under 100ml	Buy more at destination
Lip balm with SPF	Not restricted
Razor	Safety razors flagged; disposable ok	Buy at destination if unsure
Face moisturizer	Under 100ml	Cerave PM travels well

The solid products strategy: Solid shampoo bars, conditioner bars, and soap bars don't count toward your 100ml liquids allowance and last 60–80 washes. They're the single biggest upgrade to carry-on travel for anyone with hair longer than a buzz cut.

Buy toiletries at destination: Sunscreen, dry shampoo, and perfume/cologne are heavy and often available cheaper at your destination. Southeast Asia, Japan, and Europe all have excellent pharmacy options. Don't carry a full-size bottle of anything if you'll be gone more than a week.

Health and Safety

Prescription medications — Full supply plus 10% extra, carried in original labeled bottles, with a doctor's note for controlled substances
Ibuprofen / Acetaminophen — A small supply (not a full bottle)
Antihistamine — Loratadine or cetirizine; useful for allergies, hives from new foods, or insect bites
Anti-diarrheal medication — Immodium. You'll thank yourself.
Oral rehydration salts — Particularly for hot climates
Blister bandages — Compeed brand. Walking cities in new shoes creates blisters. Regular bandages don't cut it.
Hand sanitizer — 60ml travel size (counts toward liquids allowance)

If visiting Southeast Asia, Central America, or Africa:

Malaria prophylaxis if your destination requires it (consult a travel clinic 4–6 weeks before departure)
DEET-based insect repellent (buy at destination, easier)
Altitude sickness medication if visiting high-altitude destinations (Diamox, by prescription)

Travel Comfort

These items seem frivolous until hour 11 of a red-eye:

Compression socks — Reduces DVT risk on flights over 4 hours; also useful on long bus rides
Eye mask — The foam airline ones are terrible; a shaped contoured mask ($15–$30) is transformatively better
Travel neck pillow — Inflatable packs small; memory foam is better but bulkier
Packable tote bag — Fits in a pocket, unfolds into a 20L day bag for beach days or market trips
Packing cubes — 3–4 cubes of different sizes organizes clothing so you can find things without unpacking everything

Climate-Specific Additions

Tropical / Southeast Asia

Quick-dry towel (many hostels don't provide them; most guesthouses do)
Lightweight linen shirt or pants (breathable, covers legs at temples)
Sandals that can handle rough ground (Teva, Chaco, Birkenstock)

Cold Weather (Europe in winter, Patagonia, Iceland)

Merino base layer top and bottom
Heavy packable down jacket (Uniqlo Ultra Light Down = $70 and excellent)
Waterproof gloves and beanie (can buy at destination if packing space is tight)
Wool or thermal socks × 2 extra pairs

Desert / High Altitude

Sun hat with UPF 50 (packable is better)
SPF 50+ stick for face and lips
Electrolyte packets (Liquid IV, Nuun)

What to Leave Home (Always)

Full-size shampoo, conditioner, body wash — These are available everywhere on Earth
"Just in case" outfits — If you haven't worn it in the last month at home, you won't wear it traveling
Excessive books — One e-reader replaces 10 paperbacks
Multiple laptop chargers — One USB-C GaN charger (65W) charges laptops, phones, tablets, and cameras
Jeans — Heavy, take two days to dry, crease badly. Exception: if jeans are part of your daily identity and you'll feel wrong without them
Hotel-quality towels from home — Your hotel provides them; if it doesn't, a quick-dry travel towel weighs 200g

Building Your Packing List

Every destination has specific quirks. Kyoto's temple visits require shoes that slip off easily. Morocco's medinas mean you need bags that close firmly (pickpocket territory). Iceland in June needs both a rain shell and a down layer. Bali's cheap laundry services mean you can pack half the clothes you'd normally bring.

Faroway builds personalized trip itineraries and lets you specify your exact trip — climate, duration, activities, and budget — so you know exactly what to pack for your specific destinations. Going from Bangkok to Chiang Mai to a beach in Koh Samui? The packing requirements shift. Getting that right means you're not lugging unnecessary gear up a mountain or showing up at a Kyoto kaiseki dinner in hiking boots.

The Final Pack Check

Before you zip up:

Lay everything out — can you see every item?
Pick up the bag — does it feel heavier than 10kg? If so, something has to go
Ask: "What would I actually miss if I didn't have this?" — if the answer is "probably nothing," leave it
Wear your heaviest shoes and carry your laptop on the flight — they don't count toward carry-on weight limits

The goal isn't to have everything. It's to have exactly what you need and nothing you don't — so you move freely, check in fast, and spend your energy on the trip instead of your luggage.

Start planning your next international trip at faroway.ai — AI-powered itineraries that account for your actual destinations, activities, and travel style.

The Ultimate International Travel Packing List (That Actually Fits in a Carry-On)