Ryanair carry-on backpack – what dimensions should it have, and which model should you choose?

If you are flying with Ryanair and want to travel without paying extra for additional baggage, choosing the right backpack for the plane makes a big difference. Currently, Ryanair’s free small bag may measure a maximum of 40 × 30 × 20 cm and must fit under the seat in front of the passenger (information as of August 2026).

The most practical backpack for Ryanair should therefore have a regular shape, low weight, and an interior that makes it possible to use every centimeter of the available space effectively. For a short trip, such a backpack can easily replace larger cabin luggage.

Article at a glance

• Ryanair’s free carry-on baggage limit is 40 × 30 × 20 cm.
• A small Ryanair backpack must fit under the seat.
• Rectangular models work best.
• A good cabin backpack should be lightweight and easy to pack.
• For a weekend trip, one backpack may be more than enough.

What dimensions should a backpack for a Ryanair flight have?

The most important parameter is the dimensions. Ryanair’s free small bag may measure a maximum of 40 × 30 × 20 cm.

Such a backpack for the plane should fit under the seat in front of the passenger. It is worth remembering that the size after packing matters. A soft backpack can easily be overfilled, so before leaving, it is a good idea to check its width, height, and depth after packing all your belongings.

Can a backpack for Ryanair be free carry-on baggage?

Yes. A backpack for Ryanair can be free carry-on baggage if it fits within the 40 × 30 × 20 cm limit and can be placed under the seat. It does not need to be specifically labeled as a “Ryanair backpack.” It can be an ordinary backpack, provided that, once packed, it meets the airline’s requirements.

However, models designed as cabin backpacks have an advantage: their shape is usually better suited to baggage limits, making it easier to use all the available space.

Which cabin backpack works best for Ryanair?

When it comes to small luggage, its size is not the only thing that matters. A good cabin backpack should be easy to pack and comfortable to carry.

Pay attention to:

• a regular rectangular shape,
• a wide-opening main compartment,
• low weight,
• adjustable shoulder straps,
• practical pockets,
• space for a laptop or tablet,
• easy access to documents and small items.

The fewer unnecessary elements take up space inside the backpack, the more things you can actually take with you.

Ryanair backpack 40 × 30 × 20 cm – is this size enough?

For a short trip, definitely. This type of backpack works well for a weekend city break, a short business trip, or a 2–3-day getaway.

With sensible packing, you can fit basic clothing, toiletries, electronics, and documents in it.

Extra shoes and thick clothing usually take up the most space, so when baggage is limited, it is worth taking only the things you will actually need.

Can an ordinary backpack be used as carry-on baggage on Ryanair?

Yes, if its packed dimensions do not exceed 40 × 30 × 20 cm.

An ordinary backpack can therefore serve as free carry-on baggage. You just need to watch out for models with large external pockets, a thick back panel, or an unusual shape.

Cabin backpacks are usually more practical because they were designed primarily as functional air travel luggage, intended to make the best possible use of the available allowance.

Ryanair backpack with a laptop – is it a good idea?

Of course, especially when travelling for business or on a trip where you need a computer.

A good cabin backpack may have a separate laptop compartment, which makes it easier to stay organized and keeps electronics separate from clothing.

However, it is worth remembering that an extended laptop compartment takes up some of the available space. If you do not need a computer, a simpler backpack for air travel with a larger main compartment may hold more.

Cabin backpack or suitcase for Ryanair?

For the free small bag under the seat, a backpack for air travel is usually more convenient than a small suitcase.

Backpack:

• is lighter,
• does not take up space for wheels and a frame,
• is easier to carry up stairs,
• works well when using public transport,
• leaves your hands free.

A suitcase may be a better choice when you use larger cabin baggage and want a rigid construction.

Ryanair Priority – what larger baggage can you take?

If you need more space, the Priority & 2 Cabin Bags service allows you to bring an additional carry-on bag with maximum dimensions of 55 × 40 × 20 cm and a weight of up to 10 kg.

In this case, you can use a small Ryanair backpack for documents, electronics, and items needed during the flight, and larger baggage for clothes and other belongings.

The most common mistakes when choosing a backpack for Ryanair

The most common problem is overfilling the backpack. A model that fits within the limit when empty may become too deep after packing.

It is also worth avoiding:

• buying a backpack without checking its exact dimensions,
• too many protruding pockets,
• heavy models with a complex structure,
• assuming that every small backpack automatically meets Ryanair’s requirements.

It is best to measure the airplane backpack only after packing it.

FAQ – frequently asked questions about Ryanair backpacks

Which backpack can you take on Ryanair for free?

A free Ryanair backpack should fit within 40 × 30 × 20 cm and fit under the seat in front of the passenger.

Does a 40 × 30 × 20 cm backpack meet Ryanair’s requirements?

Yes. This is the current maximum size for small, free Ryanair baggage.

Does a Ryanair backpack have to fit under the seat?

Yes. Free carry-on baggage should be placed under the seat in front of the passenger.

Is a Ryanair airplane backpack enough for a weekend?

With sensible packing, a 40 × 30 × 20 cm airplane backpack can be enough for 2–3 days.

Can a Ryanair backpack hold a laptop?

Yes. You can carry a laptop in a backpack, provided that the entire bag still fits within the required dimensions after packing.

Which backpack should you choose for a Ryanair flight?

The best backpack for a Ryanair flight should be simple, lightweight, and well suited to the 40 × 30 × 20 cm limit. It does not need many extras – comfortable shoulder straps, a regular shape, and an interior that lets you use all the available space are much more important.

If you often fly with Ryanair without additional baggage, the right carry-on backpack can easily be enough for a short trip and make getting around the airport and your destination much easier.

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