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The Complete Carry-On Only Packing List

One bag. No baggage carousel. Enough system to go a full week or work a client meeting without checking anything.

Updated April 13, 2026 · 2 scenarios

Quick answer

A carry-on only packing list fits in one 40L bag under the 22 x 14 x 9 inch US carry-on limit. Pack 5 tops, 3 bottoms, one dressier outfit, 7 underwear and socks, two pairs of shoes (one worn), a TSA 3-1-1 quart bag of liquids under 3.4 oz each, a power bank under 100 Wh, a laptop, chargers, documents, and weather layers. Use packing cubes, merino wool, and wear your bulkiest items on the plane.

Carry-on only is a mindset before it is a packing list. The rules are fixed: one bag that fits the 22 x 14 x 9 inch US domestic sizer, one personal item, a single quart-size TSA liquids bag, and a power bank under 100 Wh in your carry-on (never checked). Everything else flexes around those constraints.

For a 7-day leisure trip, the answer is a capsule wardrobe in a merino-heavy rotation so you can wear items multiple times, two pairs of shoes max (one on your feet), packing cubes to compress and organize, and a plan to do one sink wash or one laundromat trip. For business travel, the formula shifts to wrinkle-resistant fabrics, a suit or blazer that folds into a garment sleeve, and a tech pouch you can pull out at security in under 10 seconds.

The bag itself is the other decision. A 40L travel backpack (Tortuga, Peak Design, Osprey Farpoint) is the one-bag gold standard because it fits carry-on, distributes weight on shoulders and hips, and opens clamshell like a suitcase. A soft-sided roller works if you walk mostly on smooth surfaces. Whatever you pick, weigh it before you leave home. Many international carriers enforce a 7 to 10 kg carry-on weight limit that US travelers often forget exists.

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One week of sightseeing, casual dinners, maybe a hike or beach day. Fits in a 40L travel backpack with a plan for one sink wash or laundromat trip mid-trip.

👕Clothing (capsule for 7 days)

Essentials

  • Merino or synthetic t-shirts x4 (Merino can be re-worn 2-3 days. 4 shirts covers 7 days.)
  • Long-sleeve top or henley
  • Pants or dark jeans (Wear on plane)
  • Lightweight pants or chinos
  • Shorts
  • Underwear (merino or synthetic) x5 (Hand-wash in sink, hang dry overnight)
  • Socks (merino) x5
  • Pajamas or sleep shorts + tee
  • Packable rain jacket (Patagonia Houdini or similar, under 4 oz)
  • Lightweight puffy or fleece midlayer (Wear on plane. Becomes your pillow.)
  • Walking shoes / sneakers (worn on plane)
  • Sandals or second pair for dinner

Nice to Have

  • Button-down or collared shirt (dinner-friendly)
  • One dress or nicer outfit
  • Swimsuit

🧴Toiletries (TSA 3-1-1 quart bag)

Essentials

  • Quart-size clear zip-top bag (Any brand. TSA does not certify specific bags.)
  • Shampoo and conditioner (under 3.4 oz each) (Or bar versions (no liquid limit))
  • Body wash (under 3.4 oz) or bar soap
  • Toothpaste (travel size)
  • Face wash and moisturizer (travel size)
  • Sunscreen SPF 30+ (travel size)
  • Deodorant (solid, not liquid) (Solids do not count against the 3-1-1 rule)
  • Toothbrush
  • Small first aid kit (Band-aids, antihistamine, ibuprofen, imodium)
  • Prescription medications (original labeled bottle)

Nice to Have

  • Razor and travel shave cream
  • Contact lens case + solution (travel size)
  • Laundry detergent sheets (no liquid) (For sink wash mid-trip)

🔌Tech & Power

Essentials

  • Phone and charging cable
  • Power bank (10,000 mAh, under 100 Wh) (Carry-on only. Never checked.)
  • Universal travel adapter (Epicka or similar. Covers EU, UK, Asia, AU.)
  • Headphones (noise-cancelling for the flight)

Nice to Have

  • Laptop or tablet + charger
  • Short charging cables (2 extras) x2
  • Kindle or e-reader
  • Camera + extra battery (if serious shooter)

🪪Documents & Wallet

Essentials

  • Passport (valid 6+ months past trip)
  • Driver's license or secondary ID
  • Credit cards (2, with no foreign transaction fees) x2
  • Debit card for ATM withdrawals
  • Local currency for first 24 hours (ATMs beat airport currency exchange)
  • Travel insurance policy (digital + printed)
  • Itinerary, hotel addresses, confirmation numbers

Nice to Have

  • Printed copies of passport, visas, reservations (Stored separately from originals)

🎒Bag System

Essentials

  • 40L carry-on travel backpack (22" x 14" x 9") (Tortuga, Peak Design, Osprey Farpoint 40)
  • Personal item / daypack (packable) (Doubles as daypack at destination)
  • Compression packing cubes (3) x3 (Clothes, underwear/socks, dirty)
  • Toiletry bag (hanging)
  • Luggage tag with email, not home address

Nice to Have

  • Tech pouch or cube
  • Money belt or hidden pocket
  • Ziplocks for wet swimsuit, snacks, wipes x3

Packing Tips

  1. 1 Weigh your packed bag before leaving home. US carriers rarely check, but most international airlines enforce a 7 to 10 kg (15 to 22 lb) carry-on limit and will gate-check anything heavier.
  2. 2 The TSA 3-1-1 rule is a container size rule, not a fill rule. A half-empty 6 oz shampoo bottle fails screening. Decant into sub-3.4 oz bottles or switch to solid bars.
  3. 3 Power banks must go in carry-on, never checked luggage. FAA limit is 100 Wh per battery, which is essentially any power bank under 27,000 mAh. Anker, INIU, and others print the Wh rating on the case.
  4. 4 Wear your bulkiest shoes, jacket, and layer on the plane. Hiking boots, a puffy, and a sweater on your body is 5 pounds and half a packing cube of space saved.
  5. 5 Merino wool is a carry-on superpower. Shirts and socks can be worn 3 to 4 days without smelling, which means 3 shirts cover a week instead of 7.
  6. 6 Hybrid pack: roll synthetic t-shirts and shorts (15% more space and less wrinkling), fold dress shirts and sweaters flat. Use compression packing cubes to squeeze it all down.
  7. 7 Keep your liquids bag, laptop, and power bank at the top of the bag for security. Modern CT scanners at some airports let liquids stay in the bag, but most still do not, so plan for the old rule.
  8. 8 Photograph your full packed kit and passport before you leave. If the bag is lost or gate-checked and damaged, you have evidence for the claim.

Frequently Asked Questions

What is the carry-on size limit?
US domestic carry-ons must fit 22 x 14 x 9 inches including wheels and handles. That is the limit enforced by American, Delta, United, and Southwest. International carriers often allow slightly different dimensions but also enforce weight limits of 7 to 10 kg (15 to 22 pounds) that US carriers rarely check. Weigh your bag before leaving and assume the stricter airline's rule applies.
What is the TSA 3-1-1 liquids rule?
Each liquid container must be 3.4 ounces (100 ml) or less, all containers must fit in a single quart-size clear zip-top bag, and each passenger gets one bag. It is a container size limit, not a fill limit, so a half-empty 6-ounce bottle still fails. Solid toiletries like bar soap, bar shampoo, and stick deodorant are not counted. Medications and baby formula can exceed the limit but must be declared at screening.
Can I bring a power bank in my carry-on?
Yes and you must. FAA rules require lithium-ion power banks to be in carry-on, never in checked luggage, because battery fires can be contained by the cabin crew. The limit is 100 Wh per battery, which is essentially any power bank under about 27,000 mAh. Larger 101 to 160 Wh batteries need airline approval, and anything over 160 Wh is banned entirely.
How many power banks can I bring on a plane?
TSA does not limit the number of power banks under 100 Wh, so you can carry multiple as long as they are all in your carry-on. Two of them over 100 Wh (up to 160 Wh) require explicit airline approval. In practice, one 10,000 mAh and one 20,000 mAh covers a full travel day and a charged backup without issue.
How do I pack a week in a carry-on?
Capsule wardrobe in a two-neutral-plus-accent palette, heavy on merino wool so shirts and socks can be worn multiple days. Five tops, three bottoms, one dressier outfit, two pairs of shoes (one on your feet), five underwear. Use compression packing cubes, roll synthetics, fold natural fibers, and plan one sink wash or laundromat trip mid-trip. Wear your bulkiest items on the plane.
Is it better to roll or fold clothes for a carry-on?
Hybrid. Roll synthetic t-shirts, shorts, socks, and underwear because rolling saves about 15 to 20% space and reduces wrinkles in those fabrics. Fold cotton button-downs, wool sweaters, and dress shirts flat because rolling creases them. Use compression packing cubes to squeeze the whole system down another 20%.
What is the best carry-on bag for one-bag travel?
A 40L travel backpack is the one-bag gold standard. Tortuga 40L, Peak Design Travel Backpack 45L (compresses to 40L), and Osprey Farpoint 40 all fit the 22 x 14 x 9 inch carry-on limit, open clamshell like a suitcase, and distribute weight on hips. A soft-sided roller like Away or Travelpro works if you walk mostly on smooth surfaces and need to carry a laptop bag separately.
Can I bring toiletries over 3.4 oz in my checked bag instead?
Yes, checked bags have no TSA liquid limit for standard toiletries. The 3-1-1 rule only applies to carry-on. If you are committed to carry-on only, switch to bar shampoo, bar soap, solid deodorant, and toothpaste tabs, which are all unregulated. Decanting into sub-3.4 oz bottles works for everything else. Cologne and perfume are the most commonly forgotten liquid.
Do I need to take my laptop out at security for carry-on?
At most US airports yes, unless you have TSA PreCheck. Keep your laptop in an easy-access sleeve or tech pouch at the top of the bag so you can pull it out in under 10 seconds. Some airports now use CT scanners that let laptops stay in the bag, but until that is universal, plan for the old rule.
What items should never go in carry-on?
Items over 3.4 oz in liquid form, liquids not in a quart bag, firearms and replicas, large knives, e-cigarette or vape batteries over 100 Wh, fireworks, flammables, and self-defense sprays (most are checked-only or banned entirely). Items that can never go in checked bags: power banks, lithium-ion batteries, spare batteries, vapes, and e-cigarettes. When in doubt, check the TSA's 'What Can I Bring' tool on tsa.gov.

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Build Your Custom Packing List

Use PackSmart to create a personalized packing list for Carry-On Only Packing List based on your trip dates, activities, and style.

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