When you hear the words “carry-on,” you might picture someone pulling a small-ish wheeled suitcase up the boarding ramp. Sure, a suitcase can be a carry-on, but what about a backpack?
I’ve been traveling for years, and during most of that time, I’ve used a backpack.
In this article, we’ll explore the ins and outs of carry-on luggage, focusing on backpacks. We’ll dive into what makes a bag a carry-on, when a backpack fits the bill, and how to choose the perfect carry-on backpack for your travels. By the end, you’ll be equipped with all the knowledge you need to pack confidently and travel smartly.
This comprehensive guide explores whether a backpack can be used as a carry-on, detailing size requirements, the advantages and disadvantages of using backpacks for travel, how to choose the right carry-on backpack, and offering practical tips for efficient packing and comfortable travel.
Understanding Carry-On and Personal Items
Before we dive into the backpack specifics, let’s clarify what we mean by carry-on and personal items. These terms are crucial to understand as they directly impact what you can bring onboard and how you pack.
Carry-On Item
A carry-on item is luggage that you’re allowed to bring into the airplane cabin and store in the overhead bin. Airlines have specific size and weight limits for carry-on bags, which can vary between carriers.
Typically, the maximum dimensions for a carry-on are around 22″ x 14″ x 9″ (56 cm x 36 cm x 23 cm), but always check with your specific airline as there can be slight variations. Anything larger than this maximum size will need to be checked.
It’s worth noting that some budget airlines have stricter carry-on policies, sometimes only allowing a personal item for free and charging for a full-sized carry-on. Always read the fine print when booking your tickets.
Personal Item
A personal item is smaller than a carry-on and must fit under the seat in front of you. This could be a purse, laptop bag, or small backpack. The size limit for personal items is usually around 18″ x 14″ x 8″ (45 cm x 35 cm x 20 cm), but again, this can vary by airline.
I always make sure to have a personal item bag with me, usually a small backpack, where I keep essentials like my passport, wallet, and a book or tablet for entertainment during the flight. This strategy ensures that even if I’m asked to gate-check my carry-on (which can happen on full flights), I still have my valuables and necessities with me.
When Is a Backpack a Carry-On?
Now that we’ve got the basics down, let’s address the main question: When can a backpack be considered a carry-on?
Size and Fit
The primary factor determining whether your backpack qualifies as a carry-on is its size. If your backpack fits within the airline’s carry-on size limits, congratulations! You’ve got yourself a carry-on backpack.
It really is that simple.
However, it’s crucial to measure your backpack when it’s fully packed. An empty backpack might seem to fit the requirements, but once stuffed with your travel essentials, it could exceed the limits.
Pro tip: I always pack my backpack as I intend to for the trip, then measure it. This way, I avoid any surprises at the airport.
Types of Backpacks
There are a lot of different backpack designs out there, and the good news is that any of them can be a carry-on, as long as they’re the right size.
- Travel-Specific Backpacks: These are made with air travel in mind. Most of these are designed specifically around carry-on size limits.
- Daypacks: Smaller backpacks usually used for day trips or as commuter bags. These often fit as personal items, but larger ones might count as your carry-on if they exceed personal item size limits.
- Hiking Backpacks: While not specifically designed for air travel, many hiking backpacks can work as carry-ons if they fit within the size limits. Just be mindful of any protruding straps or attachments that might catch on things in the overhead bin.
Why Choose a Backpack as a Carry-On
Now that we know a backpack can indeed be a carry-on, let’s explore why you might want to choose one over traditional luggage.
Versatility and Mobility

One of the biggest advantages of a backpack is the hands-free mobility it offers. Picture yourself rushing through a crowded airport or navigating uneven cobblestone streets in a charming European town. With a backpack, you’re free to move quickly and efficiently, hands available for checking your phone for directions or grabbing a quick snack.
I remember a trip where I had to sprint to catch a connecting flight. My backpack allowed me to weave through the crowd much more easily than if I’d been dragging a rolling suitcase behind me.
For adventurous travelers who like to go off the beaten path, a backpack is easily the best choice. It’s much easier to hop on and off public transportation, navigate stairs, or trek along a rough trail with a backpack than with wheeled luggage.
Organization
Modern travel backpacks are marvels of organization. Many come with multiple compartments, pockets, and even removable packing cubes. This setup allows you to organize your belongings more efficiently and access essentials quickly during your journey.
I particularly love backpacks with a separate laptop compartment and easy-access pockets for items like my passport and boarding pass. It makes going through security a breeze!
Some backpacks even come with innovative features like built-in USB charging ports, allowing you to charge your devices on the go. Others have RFID-blocking pockets to protect your credit cards and passport from electronic pickpocketing.
Adaptability
The adaptability of carry-on backpacks makes them a great choice for various types of travel. Whether you’re on a business trip in a bustling city or heading for a weekend of hiking, a well-chosen backpack can serve you equally well.
For instance, I’ve used the same backpack for both international business trips and overnight hikes. With a few adjustments, my backpack seamlessly transitioned between these very different environments. You can’t do that with a suitcase.
Downsides of Choosing a Backpack as a Carry-On
While backpacks offer many advantages, it’s only fair to discuss potential drawbacks as well. For some types of travel, an old-school suitcase is still going to be the better option.
Physical Strain

Carrying a heavy backpack for extended periods can lead to discomfort and strain on your back, shoulders, and neck, even with padded straps and ergonomic designs. I’ve learned the hard way that overpacking a backpack can lead to some sore muscles by the end of the day.
To mitigate this, it’s crucial to pack light and distribute weight evenly. Also, make sure to adjust your backpack straps properly for your body. Many travelers wear their backpacks too low, which can cause unnecessary strain.
Less Protection
Backpacks generally offer less protection for fragile items compared to hard-shell suitcases. They might also lack secure locking mechanisms, making them more vulnerable to theft.
I always make sure to pack any valuable or breakable items (like cameras) in padded cases and keep them in the center of my backpack for extra protection.
If security is a major concern, consider investing in a backpack with anti-theft features like slash-proof material, hidden zippers, and locking cables. Brands like Pacsafe specialize in these types of security-focused bags.
How to Choose a Good Carry-On Backpack
If you’ve decided a backpack is the right carry-on choice for you, here’s what to look for when selecting one:
Size and Compliance

First and foremost, ensure the backpack meets the carry-on size requirements of the airlines you frequently travel with. As mentioned earlier, this is typically around 22″ x 14″ x 9″. Some backpack manufacturers design their products specifically to comply with these limits, which can give you extra peace of mind.
When shopping, look for backpacks marketed as “carry-on compliant” or “airline approved.” These are designed to maximize the allowed carry-on space while staying within the limits of most airlines.
Comfort and Ergonomics
Look for features that will make carrying your backpack more comfortable, especially if you’ll be wearing it for extended periods. I recommend finding a backpack with thick shoulder strap padding, a supportive back panel, and a hip belt to take the weight off your shoulders.
It’s also worth trying on a backpack before you buy it—or, if you’re shopping online, buy from a company that has a good return policy. Even if a backpack checks all the boxes for comfort, it just may not fit your body.
Once you get your backpack, load it up with weight, put it on your back, and try walking around. Are there any pressure points? Does the weight feel supported?
Organization and Accessibility
Choose a backpack with multiple compartments, including dedicated sections for electronics, toiletries, and other essentials. Easy access pockets for quick-reach items like passports and tickets are a bonus. Some backpacks even open like a suitcase, making packing and unpacking much easier.
Look for features like:
- A padded laptop compartment
- Internal compression straps to keep clothes in place
- External water bottle pockets
- A top quick-access pocket for items you need to reach frequently
I’m a big fan of backpacks with a “clamshell” opening, which allows you to pack and access your belongings more like a traditional suitcase.
Durability and Material

Opt for a backpack made from durable, water-resistant materials that can withstand the rigors of travel. Reinforced stitching and quality zippers also contribute to the longevity and security of the bag. My travel backpack is almost 10 years old, and it’s still going strong because it was well-made to begin with.
Look for high-quality materials like Cordura or heavy-duty ripstop nylon. YKK zippers are known for their reliability, so keep an eye out for these.
Tips for Traveling with a Carry-On Backpack
Once you’ve chosen your perfect carry-on backpack, here are some tips to make your travels smoother:
Pack Light

One of the best pieces of advice I can give you is to pack light. You’ll be much happier and more comfortable if your backpack isn’t super heavy. Using a carry-on backpack is a great opportunity to get more minimalist with your travel gear. Ask yourself if you really need that extra pair of shoes or that bulky jacket.
A good rule of thumb is to lay out everything you think you need, then remove about a third of it. You’ll likely find you can manage with less than you initially thought.
Pack Strategically
Use packing cubes and compression bags to maximize space and keep your belongings organized. I swear by packing cubes – they’ve revolutionized the way I pack! Also, try rolling your clothes instead of folding them. This technique not only minimizes wrinkles but also saves space.
Here are some basic packing strategies I use:
- Heavy items at the bottom (near your lower back when wearing the backpack)
- Softer, lighter items on top
- Frequently needed items in easy-access pockets
- Don’t forget to use every bit of space – stuff socks and underwear into shoes, for example.
Distribute Weight Evenly
Place heavier items at the bottom of the backpack and closer to your back to maintain balance and reduce strain. Use the backpack’s various compartments to evenly distribute weight and avoid overloading one side. Your back will thank you later!
If your backpack has a hip belt, make sure to use it. It helps transfer weight from your shoulders to your hips, making the load feel much lighter.
Check Airline Policies
Always verify the size and weight restrictions of your airline’s carry-on luggage to avoid additional fees or the need to check your backpack. Each airline has specific guidelines that can vary, so it’s essential to be aware of them before packing. I make it a habit to double-check these policies before every trip, even if I’ve flown with the airline before, as rules can change.
Be especially vigilant with budget airlines, as they often have stricter and more variable luggage policies.
Use Your Personal Item Wisely
Remember, in addition to your carry-on backpack, you’re usually allowed a personal item. Use a small daypack or laptop bag for this and pack it with items you’ll want easy access to during the flight, as well as any valuables or fragile items.
Be Prepared for Security

To breeze through security, pack your liquids in an easily accessible spot and be prepared to remove your laptop if required. Some backpacks have TSA-friendly laptop compartments that can be laid flat on the X-ray belt without removing the laptop.
Practice Makes Perfect
Before your trip, do a test by packing all your travel gear in your backpack to make sure it fits. Wear your fully packed backpack around the house or on a short walk. This will give you a feel for the weight and help you identify if you need to make any adjustments.
Conclusion
So, is a backpack a carry-on? The answer is: it can be! As long as your backpack fits within the airline’s size restrictions for carry-on luggage, you’re good to go. Backpacks offer a level of versatility and mobility that traditional luggage can’t match, making them an excellent choice for many types of travelers.
Remember, the key to successful travel with a backpack as your carry-on lies in choosing the right backpack, packing smartly, and always being aware of airline policies. By following the tips and advice in this article, you’ll be well-prepared to navigate airports and explore your destinations with ease and comfort.
Traveling with a backpack can open up a world of possibilities. It allows you to be more mobile, adapt to different situations, and often avoid those pesky checked baggage fees. Plus, there’s something liberating about knowing everything you need is right there on your back.
The goal is to make your travels smoother and more enjoyable. A well-chosen and properly packed carry-on backpack can be your ticket to hassle-free adventures. So go ahead, embrace the backpack life, and get ready to explore the world with newfound freedom and flexibility.
FAQ
Is a backpack considered a carry-on?
A backpack can be considered a carry-on as long as it fits within the airline’s carry-on size restrictions.
Can you take a backpack on a plane for free?
You can take your backpack on a plane for free as long as it’s small enough to fit within the personal item size limits.
What size backpack fits under an airplane seat?
The most common size limit for a personal item backpack to go under the airplane seat is 18” x 14” x 8”.
Can I bring a backpack through TSA?
Yes, you can bring a backpack through TSA as long as it is small enough to count as a carry-on.
What happens if your personal item is too big?
If your personal item is too big, it will have to count as your carry-on. That means you may have to check your main carry-on or pay an extra fee.