Travel and Airplane Backpacks

Backpack for the plane – what size to choose?

A backpack for the plane is the simplest way to fly with luggage and avoid paying extra at the gate. With low-cost airlines such as Ryanair and Wizz Air, your ticket price includes one small bag measuring up to 40x30x20 cm, which must fit under the seat in front of you. On Wizz Air it can weigh up to 10 kg, while Ryanair does not specify a separate weight limit for it. This is exactly the size that most WINGS cabin backpacks fit, which you will find in the 40x30x20 backpacks category.

You will also often come across the 40x20x25 backpack label. This was the former free baggage limit at Ryanair. A backpack with these dimensions still fits within the current 40x30x20 cm limit, so it can safely fly as an under-seat bag. If you fly with traditional airlines such as LOT, check the personal item limit for your fare, as it can be smaller. We have collected the current dimensions for over a dozen carriers in the table cabin baggage dimensions 2026.

Cabin backpack or suitcase?

A cabin backpack has the advantage where free baggage and free hands matter most. Its soft structure fits into the measuring frame more easily, and after landing the backpack is handy for sightseeing. A wheeled cabin suitcase works better when you purchase a larger carry-on and have long distances to cover at the airport. Many people combine both solutions: a cabin suitcase goes in the overhead locker, and a 40x30x20 backpack under the seat.

What to look for when choosing a backpack for the plane?

The most important thing is the dimensions including pockets and handles, because that is how staff measure your bag at the gate. A good backpack for the plane opens wide like a suitcase, making it easier to pack and quicker to take out your toiletry bag at security. A separate laptop compartment, a document pocket close to your back and a trolley strap that lets you slide the backpack over a suitcase handle all come in handy. Also pay attention to the backpack's own weight and a rain-resistant material.

If you want to fit more things in the same size, check out the COMPRESA vacuum backpack, in which clothes can be compressed in a separate compartment. Remember, though, that compression reduces the volume, not the weight of your luggage.

How much fits in a 40x30x20 cm backpack?

A backpack of this size usually has a capacity of around 20–24 litres. With sensible packing, you can fit clothes for 2–3 days, a toiletry bag with liquids up to 100 ml, a charger and documents. It is best to roll your clothes, and to wear the heaviest items, such as a jacket or hoodie. You will find more tips in the article how to pack a backpack for the plane for 2–3 days.

Travel backpacks for longer trips

Besides cabin backpacks, this category also includes larger travel backpacks for weekends, business trips and active holidays. They have more compartments, a more comfortable carrying system and often an expansion option. Such models work well on trains, buses and in cars, and on planes as larger cabin baggage if your fare allows it. Remember that a backpack with an expansion feature may exceed the 40x30x20 cm limit once the zip is opened.

Women's and men's backpack for the plane

WINGS cabin backpacks have a universal cut and neutral colours, so they work equally well as a women's and a men's backpack. If you are looking for a specific style, also check the women's backpacks and men's backpacks categories. An overview of models and tips on how to choose a cabin backpack can be found in the article backpack for the plane – which cabin backpack to choose.

Airline rules change several times a year, so always check the carrier's regulations and the terms of your fare before departure. The information on this page reflects the situation as of November 2026.