Travel Packing Guides
How to pack a carry-on, what fits under the seat, and the airline size rules that decide it all — the reference pages our roundups link back to.
The bag is only half of one-bag travel; the other half is knowing what the airline will let you carry and how to fit a trip into it. These guides are the reference layer under our roundups — the airline size limits, the packing method, and the decisions (backpack or suitcase, cubes or compression bags, 40L or 45L) that shape which bag you should buy in the first place. Start with whatever question is stopping you, and every guide links back to the picks it supports.
The one we lean on most is the carry-on and personal-item size guide: a maintained, airline-by-airline table of the actual dimensions, cited to each airline’s own page and dated. Nearly every other roundup buries those numbers in prose or skips them; having them in one place is what lets us do honest carry-on fit math on every pack we recommend.
Everything in Guides
Carry-On & Personal-Item Size Guide
The airline-by-airline carry-on and personal-item dimensions, in one maintained table, cited to each airline's own page.
How to Pack a Carry-On
A repeatable method for fitting a week into a carry-on — what to roll, what to cube, and the order it goes in.
How to Use Packing Cubes
The system that makes cubes worth the money — assigning cubes, rolling vs folding, and compressing without wrinkling everything.
One-Bag Travel Packing List
A tested-in-principle capsule packing list for traveling a week or a month out of a single carry-on backpack.
What Size Travel Backpack Do You Need?
30L vs 40L vs 45L — how to pick a capacity by trip length and body size, and why bigger is usually the wrong answer.
Travel Backpack vs Suitcase
When a backpack beats a wheeled carry-on and when it doesn't — a decision framed on cobblestones, stairs, backs and gate agents.
Packing Cubes vs Compression Bags
Organization or raw space savings? Which one actually helps in a carry-on, and why most people should use both.
How to use these guides
If you’re choosing a bag, start with what size travel backpack you need and backpack vs suitcase— they settle the two decisions that determine everything else, before you look at a single product.
If you’ve got the bag and need to pack it, the how-to-pack-a-carry-on method and the one-bag packing list get a week into a carry-on without a fight, and how to use packing cubes makes your organizers actually earn their keep.
If you’re worried about the gate, the carry-on size guideis the one to bookmark — check your airline’s number before you fly, because that’s the rule that actually gets enforced.
Why we cite and date everything
Airline baggage rules change, vary by fare and aircraft, and are enforced at the gate’s discretion. So every figure in these guides is pulled from the airline’s own page and stamped with the date we checked it. Treat them as a well-sourced starting point, and confirm the current rule for your specific flight before you rely on it.
Frequently asked questions
How big can a carry-on be?
On most US major airlines, up to 22 x 14 x 9 inches (56 x 36 x 23 cm) including wheels and handles. Southwest and Frontier allow a larger 24 x 16 x 10, and low-cost European carriers can be far stricter — Ryanair's free bag is just 40 x 20 x 25 cm. The carry-on size guide lists every airline's number.
What's the difference between a carry-on and a personal item?
The carry-on goes in the overhead bin (up to ~22 x 14 x 9 in on US majors); the personal item is smaller and fits under the seat in front of you (roughly 18 x 14 x 8 in or less, varying by airline). On most standard fares you get both; on basic-economy fares you may only get the personal item.
How do I fit a week into a carry-on?
Plan a small mix-and-match capsule, use packing cubes, wear your bulkiest items on the plane, and decant liquids into travel sizes. The method matters more than the bag — our how-to-pack-a-carry-on guide walks through the order, and the one-bag packing list gives you the capsule to start from.