If you've ever booked a budget flight, you've probably seen the terms personal item and carry-on.
But what's the actual difference?
And where does a backpack fit into the equation?
Understanding the difference can make travelling easier, help you avoid unnecessary baggage fees and make choosing the right travel bag much simpler.
What Is a Personal Item?
A personal item is the smaller piece of luggage that many airlines allow passengers to take onboard without purchasing additional cabin baggage.
It's typically designed to fit under the seat in front of you.
Depending on the airline, this could be a:
- Small backpack
- Handbag
- Laptop bag
- Tote bag
- Small daypack
The exact size allowance varies between airlines, so it's always worth checking the requirements for your specific flight before travelling.
The important thing to remember is that personal-item allowances aren't universal.
What Is a Carry-On Bag?
A carry-on, sometimes called cabin baggage or hand luggage, is generally larger than a personal item.
Rather than fitting underneath the seat, it is usually designed to go into the overhead locker.
A carry-on might be:
- A larger backpack
- Cabin suitcase
- Travel bag
- Duffel bag
Again, the exact dimensions and weight restrictions depend on the airline and ticket you're travelling on.
That's why checking the airline's current baggage policy before you fly is always a good idea.
Personal Item vs Carry-On
The simplest way to think about it is:
Personal item = under the seat
Carry-on = overhead locker
However, the exact dimensions can vary considerably between airlines.
A bag that qualifies as a personal item on one flight might be considered too large on another.
If you're travelling with a backpack, don't assume that its capacity automatically determines whether it's a personal item or carry-on.
Dimensions matter.
Why Backpack Dimensions Matter
Two backpacks can have a similar litre capacity but completely different dimensions.
One might be tall and narrow.
Another might be shorter and wider.
That means capacity alone doesn't tell you whether a bag will meet an airline's baggage requirements.
When choosing a travel backpack, look at:
- Height
- Width
- Depth
- Capacity
- Weight
- How the bag is structured
And always compare those measurements with the airline you're flying with.
Can a 24L Backpack Be Used for Travel?
Absolutely.
A 24L backpack can be a useful size for short trips because it gives you enough room for clothing, toiletries, technology and everyday essentials without becoming excessively large.
But whether it qualifies as a personal item or carry-on depends on its actual dimensions and the airline's specific rules.
That's an important distinction.
Rather than assuming that every 24L backpack has the same travel permissions, check the measurements of the individual bag against your airline's allowance.
Why One Bag Can Work for Both Everyday Life and Travel
This is one of the reasons we designed The Nomad Pack around a 24L capacity.
We didn't want to create a backpack that only came out when it was time to travel.
Your everyday backpack might carry your laptop, charger, headphones and essentials during the week.
Then, when Friday comes around, the same bag can carry your clothes and toiletries for a weekend away.
That's the idea behind Nomadico.
One bag that moves with you.
Don't Rely on Capacity Alone
When choosing a travel backpack, it's easy to focus on litres.
20L.
24L.
30L.
40L.
But capacity is only one part of the equation.
A good travel backpack should also make the space easy to use.
Consider:
Organisation
Can you separate your laptop, clothing and smaller essentials?
Accessibility
Can you reach the things you need without unpacking the entire bag?
Comfort
Will you actually want to carry it for several hours?
Dimensions
Does the shape work for the airlines you regularly use?
Versatility
Can you use it when you're not travelling?
A bag can have plenty of capacity and still be frustrating to travel with.
How to Avoid Baggage Surprises
Before heading to the airport, check three things:
1. Your airline's baggage allowance
Don't rely on what was allowed on your previous flight.
2. Your bag's dimensions
Measure the actual bag rather than estimating based on its litre capacity.
3. Your ticket type
Some fares include different baggage allowances from others.
A few minutes of checking beforehand can save a lot of hassle at the airport.
The Best Travel Bag Isn't Necessarily the Biggest
It's tempting to buy the biggest backpack you can find.
More space sounds better.
But bigger isn't always more practical.
A smaller, well-organised backpack can be easier to carry, easier to store and more useful outside of travel.
For someone who wants a bag that can move between commuting, everyday life and short trips, a mid-sized backpack can make a lot of sense.
That's the thinking behind The Nomad Pack.
24L.
Organised for everyday essentials.
Large enough for short trips.
Compact enough to use when you're not travelling.
So, Personal Item or Carry-On?
It depends on your airline, your ticket and the amount you're taking with you.
A personal item is generally designed to fit underneath the seat.
A carry-on is generally designed for the overhead locker.
But the exact rules vary, so always check the current requirements for your specific airline.
And if you're choosing a backpack specifically for travel, don't just look at the litre capacity.
Look at the dimensions, organisation and how you'll actually use the bag.
Because the best travel bag isn't necessarily the one with the most space.
It's the one that fits into your life.
One Bag. Every Journey.