How to Pack a Carry-On for a Week

A carry-on packed for a full week comes down to three numbers: the TSA quart-bag rule for liquids, your airline’s exact bin dimensions, and how many liters your suitcase actually holds once it is closed. Get those three right and seven days of clothes fit in one bag with room for a jacket. The Practical Choice does not pack or test luggage in its own lab; the steps below come from published TSA and airline pages, a CPSC recall search, and named independent testers. See how we score for the full method.

How to Pack a Carry-On for a Week, Step by Step

Work in this order so the size and weight checks happen before you are standing at the gate.

1. Confirm your airline’s exact bin size first. United, Delta, and American all cap a carry-on at 22 in x 14 in x 9 in including wheels and handles, and Delta also caps the combined length, width, and height at 45 linear inches. Southwest is the most forgiving of the big four at 24 in x 16 in x 10 in. Check your specific airline’s page before you buy or pack, since a bag that clears one carrier’s cage can fail another’s by a few inches.
2. Weigh the empty bag on a home scale, not just the spec sheet. Brand-listed weights and scale weights do not always match. Away lists its polycarbonate Carry-On at 7.1 lb on its own product page, Consumer Reports weighed the same model at 8.0 lb on its lab scale, and OutdoorGearLab’s scale read 7.4 lb. A pound of difference in the empty bag is a pound less of clothes before you hit an airline’s weight limit.
3. Build your liquids around one quart-size bag. TSA allows containers of 3.4 oz (100 mL) or less, all packed into a single quart-size clear, sealable bag; medications and infant nourishments are exempt from the size limit. Anything larger goes in checked luggage or gets bought after security.
4. Pack heavy, structured items against the wheels and spine of the bag first. Shoes, toiletry kits, and folded layers go on the bottom near the wheels so they do not shift and throw off the bag’s balance when you roll it. Lighter, flexible items go on top.
5. Use a compression panel or packing cubes to divide the week, not just the categories. A clamshell case with a mesh-covered side and a cinching compression panel, the layout Away builds into its Carry-On, keeps one half for structured items and uses the compression side to flatten soft clothing so it takes less volume. Packing cubes do the same job in a duffel-style bag by grouping days or outfit types into separate zippered pouches.
6. Keep a change of clothes and essentials in your personal item. American caps a personal item at 18 in x 14 in x 8 in, Delta and United both use roughly a similar under-seat allowance for a purse, laptop bag, or small backpack. If your carry-on gets gate-checked on a full flight, medication, chargers, and one change of clothes in the personal item still travel with you.
7. Weigh the packed bag before leaving for the airport. US carriers generally do not enforce a carry-on weight limit, but OutdoorGearLab’s own buying guide notes that many budget and international airlines weigh carry-ons at check-in with limits between 15 and 18 lb, so an overstuffed bag is more likely to get flagged for being heavy than for being oversized on those routes.
8. Double check width, not just height and depth. Most fliers eyeball a bag against a gate sizer’s height and depth and skip the width. United, Delta, and American all cap width at 14 in, and a popular hardshell case can measure 14.4 in wide on the brand’s own spec sheet, a figure Consumer Reports’ lab confirmed independently. That 0.4 in is easy to miss until a strict gate agent measures it.

Common Carry-On Packing Mistakes to Avoid

• Trusting the brand’s weight or capacity number without a second check. As above, three sources gave three different empty weights for the same suitcase, a 0.9 lb spread between the lightest and heaviest reading.
• Packing an expandable case fully zipped out, then getting gate-checked. OutdoorGearLab flags one 23-in expandable model as tall enough that “you may be required to gate-check this bag before boarding,” since some overhead bins run 22 in deep or less.
• Ignoring the quart-bag rule and hoping a Ziploc close enough will pass. TSA officers pull any liquid not sealed in a proper quart-size bag for extra screening, which slows down the whole line, not just your bag.
• Assuming a hardshell case will not show wear. Owner reviews on Trustpilot and independent testers both note that polycarbonate shells scuff and scratch with normal overhead-bin use, even on cases marketed as scratch resistant. That is cosmetic wear, not structural failure, but it surprises first-time hardshell buyers.
• Packing toiletries loose instead of in a dedicated kit. A leak inside the main compartment, next to clothes meant for day one, ruins the morning of a trip faster than any size or weight mistake.

When to Replace Your Carry-On

Cosmetic scuffs are not a reason to replace a case. A wheel that no longer spins straight, a zipper that needs two hands to force shut, or a shell crack that has grown since the last trip are the real signals. Some brands build in a way to check this without guessing: Away states its own handle design is tested through 1,500 pulls at up to 60 lb and its wheels are rolled the equivalent of 480 New York City blocks before a model ships, a manufacturer claim rather than an independent figure, but it sets a rough bar for what “worn out” should take. Independent testers flag the same failure points across brands. OutdoorGearLab lists a “weak trolley handle” as a con on the budget Samsonite Freeform Spinner and “trolley handle rattles” on the SwissGear Sion, both signs the handle mechanism is the first part to go on lower-cost cases. If your bag is past its warranty window and showing one of those mechanical failures rather than just scratches, it is cheaper to replace than repair. For side-by-side current picks at every price point, see The Best Carry-On Luggage.

FAQ

How many liters of carry-on do I need for a week?

Around 35 to 40 liters covers most week-long trips. OutdoorGearLab’s independent testing found a 29.8-liter case works best for 2 to 4 days of clothes, while a 49.5-liter expandable case can hold close to two weeks; a case in the high-30-liter range sits in between and matches what brands like Away market as good for 5 to 7 outfits.

Can I bring a full-size bottle of shampoo in my carry-on?

No. TSA limits carry-on liquids, gels, and aerosols to containers of 3.4 oz (100 mL) or less, all inside one quart-size clear, sealable bag. A full-size bottle needs to go in checked luggage or get replaced with a travel-size one.

What happens if my carry-on does not fit the gate sizer?

It gets tagged and checked at the gate, usually free of charge, and returned to you at baggage claim or on the jet bridge after landing, depending on the airline and aircraft. United and Delta both describe this gate-check process on their carry-on pages, and it is more likely to happen on a full flight or on a smaller regional aircraft with limited bin space.

Do I need a TSA-approved lock on a carry-on?

It is optional but convenient. A TSA-approved lock has a keyway that airport screeners can open with a master key if your bag is pulled for a hand check, so they do not need to cut the lock off to inspect it.

Has any current carry-on suitcase brand been recalled?

A CPSC SaferProducts.gov search for carry-on luggage run on September 16, 2026 returned no active recalls. A broader search for “luggage” turned up only a 1998 recall of children’s rolling luggage over lead paint in the artwork, unrelated to any current carry-on suitcase brand or model.