Choosing a 40x30x20 cm Ryanair backpack: how to avoid a bad buy

A 40x30x20 cm Ryanair backpack might seem easy to choose: find a bag with the right dimensions, fill it with clothes and board the plane. In practice, problems often come down to the details. A backpack may have the right dimensions on paper, but a bulging front pocket, overfilled compartments or poor support can still make it difficult to fit under the seat.

For budget-conscious holidaymakers, business travellers, students and commuters, three pitfalls are particularly important:

• Dimensions aren’t checked properly. Manufacturers usually list the external dimensions. Zips, handles and soft side pockets can take up extra space.
• Capacity is confused with carrying comfort. A large capacity is useful, but without padded shoulder straps and a breathable back panel, the bag can become uncomfortable on a long travel day.
• “Waterproof” is interpreted too broadly. A water-resistant backpack can help with light rain or a spilled drink, but it isn’t automatically suitable for prolonged heavy rain.

So check more than just the product title: look at the exact specifications and the airline’s current baggage rules too.

Which specifications matter?

1. Dimensions and fitting under the seat

For a Ryanair personal item, the permitted dimensions are what matter. A 40 x 30 x 20 cm model is designed around this commonly used limit, but always check the conditions for your ticket and flight. Airline rules can change.

Be aware of the difference between:

• Nominal external dimensions: the measurements provided by the manufacturer.
• Usable packing space: the space left once the laptop compartment, lining and zips are taken into account.
• Flexible capacity: a soft backpack can be compressed slightly, but only if it isn’t overfilled.

An under-seat backpack with compression straps is practical if you want to put the bag under the seat. Tighten the straps before you reach the gate, and make sure nothing is sticking out of the side pockets.

2. Weight, capacity and compartments

A lightweight travel backpack reduces the overall weight you have to carry. According to the product information, the Kono backpack in this selection weighs 0.5 kg and has a stated capacity of around 24 litres. That gives you room for clothes, toiletries, documents and electronics on a short trip.

A useful layout includes:

• A front pocket for your passport, phone and tickets.
• A main compartment that opens wide, so you can pack your clothes neatly.
• A separate, padded laptop compartment.
• Small pockets for cables, pens and a power bank.

A travel backpack with a laptop compartment is particularly useful for business travellers and students. If you’re looking at a 15.6-inch laptop backpack, check not only that the compartment is big enough, but that it offers sufficient protection too. A laptop sleeve won’t stop a device being damaged if the backpack is put down hard, so don’t pack heavy items against your laptop.

3. Material and carrying comfort

Polyester is often used for a hand luggage backpack because it’s relatively lightweight and easy to clean. The Kono model’s product description says that it’s made from tear-resistant, water-resistant polyester. This is a product specification, not a guarantee that it will keep out water during prolonged rain.

Also look for:

• Padded shoulder straps for everyday commuting.
• A breathable back panel for greater carrying comfort.
• A reinforced handle for quickly lifting the bag during checks or boarding.
• A trolley strap to slide the backpack over a suitcase handle.
• Sturdy zips and seams, especially if you’ll be using it frequently.

A holdall worn as a backpack can be handy for short trips, but it isn’t always as well organised or comfortable as a model with a laptop compartment and back support.

Recommended models for different needs

Suitable for: Budget-conscious first-time buyers

Kono Ryanair Cabin Backpack 40x30x20cm

Why it suits this profile: This hand luggage backpack combines the stated 40 x 30 x 20 cm dimensions with a layout suited to short trips, studying and everyday use.

How this product avoids the pitfall

The product information lists the external dimensions, a weight of 0.5 kg and a capacity of around 24 litres. This helps you get a better idea of the weight and packing space in advance.

Key benefit & features

Three compartments, a padded compartment for a laptop up to 15.6 inches, compression straps and a trolley strap.

Suitable for: Buyers looking for premium quality

British Traveller 20 Inch Soft Shell Cabin Suitcase

Why it suits this profile: If you’d rather wheel your luggage than carry it, a compact cabin trolley could be an alternative to a cabin backpack for short flights.

How this product avoids the pitfall

A trolley means you don’t have to carry all the weight on your shoulders. Always check the permitted dimensions for your Ryanair fare, though.

Key benefit & features

Soft-shell design, TSA lock, quiet TPE wheels and a laptop compartment, according to the product name.

Suitable for: Specific needs & frequent travellers

Kono 6-in-1 Hanging Travel Organiser Bag

Why it suits this profile: This is a handy addition for travellers who want to keep clothes, underwear and toiletries organised in a backpack or suitcase.

How this product avoids the pitfall

The six separate zipped compartments help keep your belongings from getting jumbled together. However, when unfolded, the bag measures 45 x 15 x 34 cm, so it isn’t a personal item backpack.

Key benefit & features

Foldable design, water-resistant polyester, six compartments and a trolley strap.

Pack without hold-ups at the gate

Don’t fill your backpack right up to the last centimetre. Here’s a practical way to pack:

1. Put your laptop and tablet in the padded compartment.
2. Place heavy items close to the back panel.
3. Use the main compartment for clothes and shoes.
4. Keep your passport, phone and boarding pass in the front pocket.
5. Tighten the compression straps before measuring the bag or sliding it under the seat.
6. Check the dimensions with a tape measure when the bag is fully packed.

This will help prevent an apparently suitable 40x30x20 cm Ryanair backpack from becoming larger or harder to handle when overpacked.

Frequently asked questions

Will a 40x30x20 cm backpack always fit under the seat on a Ryanair flight?

Not necessarily. The permitted dimensions depend on the fare you’ve booked and the current conditions. Check Ryanair’s rules before you travel, and measure the fully packed backpack, including any protruding pockets and handles.

Is a 40x30x20 cm backpack suitable for a weekend away?

That depends on how you pack. According to the product information, a model with a capacity of around 24 litres may be suitable for two to three days, particularly if you pack light. Thick clothing, large shoes or lots of electronics can quickly take up extra space.

How do I care for a water-resistant hand luggage backpack?

Wipe the backpack with a soft, slightly damp cloth and avoid abrasive cleaning products. Let it dry completely before putting it away. Water-resistant material offers protection from light rain, but it’s no substitute for a rain cover or waterproof bag in prolonged rain.