The Best Kids' Backpack for Travel

A child’s weight budget is small

The usual guidance is that a child should carry no more than roughly a fifth of their body weight, and less for any distance. That gives you a total, and the empty pack comes out of it first.

At the small end that is a quarter of the budget spent on the bag itself. It is the same arithmetic that governs an adult carry-on against a weight cap, with a much tighter cap.

Small is a feature, not a compromise

The counterintuitive part. Adults are usually told to buy the largest bag that fits the rules; for a child the opposite applies, because a bag that can hold too much will hold too much. Children do not self-limit, and neither do the adults packing for them.

A 20 L pack physically cannot exceed a sensible load. A 35 L pack can be filled to a weight the child cannot carry, at which point you are carrying it — and you are carrying it in addition to your own bag, which was the thing this was supposed to avoid.

What each one publishes

Only one of these publishes a weight, a capacity, a price and a warranty term together — and it is also the lightest and the cheapest per covered year on the whole site at $4.00. That is an unusually uncomplicated recommendation.

It should fit under the seat

A child’s pack that fits the under-seat box is a pack they can reach in flight without standing up, opening a bin, or asking you. That is worth more on a plane than any feature on the bag.

The constraint is United’s published 17 × 10 × 9 in, the tightest US personal-item box we track. The Daylite Plus at 19 × 11 × 9.5 in is over it, and fits the published personal-item box at American, Southwest, Frontier and Allegiant. Every carrier’s published figure.

Fit matters at this size too

The rules do not change because the person is small. A pack should sit with its weight on the hips rather than hanging from the shoulders, and the harness should be short enough that the shoulder straps follow the shoulder without a gap.

• Measure the torso, not the height. Same landmarks as an adult: the bony bump at the base of the neck down to the top of the hip bones. The full method, in five minutes.
• The pack should not extend below the hips. If it does, the harness is too long and the load will sit on the shoulders whatever you tighten.
• Use the sternum strap. On narrow shoulders it is the difference between straps that stay put and straps that slide off.
• Heavy things against the back. Weight held away from the spine creates a lever, and children compensate by leaning forward.

What actually goes in it

The pack is the child’s flight bag, not their wardrobe. Their clothes live in a cube in an adult’s case. Why that division works.

• One change of clothes, in case of the obvious.
• Entertainment they chose themselves, which is the point.
• A water bottle, empty through security and filled after.
• Snacks — solid food clears the checkpoint without difficulty.
• Their own headphones, because the seatback jack is a 3.5 mm socket.
• Nothing valuable, nothing sharp, and no batteries they cannot account for.

The recommendation

• Best kids’ travel pack → Osprey Daylite Plus 20L. 1.31 lb, a warranty naming no end date, $4.00 per covered year, and small enough to enforce its own weight limit.
• An older child who wants their own carry-on → the Narwey at 18 × 14 × 8 in, which matches the published personal-item box at three US carriers exactly.
• A teenager traveling one-bag → treat them as an adult and use the full ranking.
• Do not buy → a 35 L pack for a small child. The volume is the problem.