How to Choose the Right Backpack Size for Carry-On Only Travel

Want to ditch those baggage fees and breeze through the airport? Traveling with just a carry-on backpack is a game-changer. This guide will show you how to pick the perfect backpack size, so you can avoid surprises and enjoy a smoother, lighter journey. No more waiting at the baggage carousel or worrying about lost luggage!

What You'll Need

A rough idea of your airline's rules (if you know them).
A measuring tape might help later.

Step 1: Understand the Two Main Carry-On Categories

Airlines generally have two carry-on types:

Overhead Bin Bags: These go above your seat. They usually max out around 40-45 liters and fit standard dimensions like 22 x 14 x 9 inches (56 x 36 x 23 cm). Great for week-long trips.
Personal Items: These must fit under the seat in front of you. They're smaller, typically 18-30 liters. Perfect for short trips or budget airlines that charge for overhead bags.

Step 2: Check Your Airline's Specific Rules

Airline size rules can be a bit wild! What works for a big international flight might be too large for a budget regional carrier. Always check your specific airline's website before you fly. Some are super strict, even using sizing boxes at the gate.

Step 3: Pick Your Backpack Capacity (18L-30L vs. 40L-45L)

For Shorter Trips or Budget Flights (18L-30L): If you're going for a weekend or flying a budget airline (which often lets personal items fly free), aim for a smaller pack that fits under your seat. You'll save money and avoid gate-checking.
For Longer Trips or Major Airlines (40L-45L): For trips lasting a week or more, or if you're flying a major airline with more generous overhead allowances, a 40-45L bag is usually your best bet. This gives you more space for packing cubes and gear.

Step 4: Go Soft, Not Hard

When it comes to carry-ons, soft-sided backpacks win! Why? They can often be squished or compressed into those tricky sizing boxes, even if they're a tiny bit over. Rigid suitcases? Not a chance. If it doesn't fit perfectly, you're checking it.

Step 5: Don't Forget About Weight Limits!

Even if your backpack fits the size, watch the weight! Many international and budget airlines have strict carry-on weight limits, often between 7kg and 10kg. A fully packed 45L bag can easily go over, leading to a forced check-in, no matter its size.

Step 6: Pack Smart for Security

Remember the TSA's 3-1-1 rule for liquids: 3.4-ounce containers in one quart-sized bag. This limits your toiletries, so plan ahead when relying on just a small pack. Anything too big will be confiscated.

Step 7: Meet the 8000Kicks NOMAD – Your Travel Sidekick

Want a backpack that tackles all these travel headaches? The NOMAD backpack from 8000Kicks is a game-changer. This innovative 3-in-1 design starts as an 18L everyday pack and expands to a roomy 45L weekender. Our roll-top backpacks are made to fit airline personal item dimensions, including those super strict ones from Ryanair, Easyjet, and Spirit. This means you can fly with zero extra baggage fees, easily adjusting the bag's size for any trip.

Made from tough, sustainable, 100% vegan industrial hemp, 8000Kicks backpacks are a top-notch, planet-friendly choice for smart travelers. We pioneered the 1st weatherproof hemp shoes, and we bring that same durable build to our backpacks. They feature a special weatherproof coating that repels liquids and dust, making them super tough and easy to clean. With a comfy fit and cool minimalist design, an 8000Kicks backpack looks great in a business meeting or exploring a new city.

We want you to be happy! 8000Kicks offers free shipping and exchanges in the US and EU on orders over $90, plus a generous 60-day return policy. If you're looking to pack smart, the 8000Kicks NOMAD bag offers clear advantages over typical synthetic luggage. It's versatile and much better for the planet.

Frequently Asked Questions

Is a 45L backpack too big for a carry-on?

A 45L backpack is usually the biggest you can take as an overhead carry-on on most major airlines, as long as it's around 22 x 14 x 9 inches. But it's too large to be a personal item on budget carriers.

What's the difference between a carry-on and a personal item?

A carry-on bag goes in the overhead bin and can be up to about 45L. A personal item has to fit completely under the seat in front of you, usually capping around 18L to 30L, depending on the airline.

Are roll-top backpacks secure for air travel?

Absolutely! The rolled-up closure makes it tough for stuff to fall out and adds extra protection from rain and dust while you're traveling. Your belongings stay safe and sound.

Are hemp backpacks legal to travel with internationally?

Yes, 8000Kicks hemp products are 100% legal everywhere! Industrial hemp is the chill cousin of marijuana, with almost no psychoactive stuff. So, you'll glide through international security and customs with zero fuss.

Conclusion

Choosing the right backpack, from 18L to 45L, gives you the freedom to master one-bag travel. By knowing your airline's size limits, you can pack smart, whether your bag goes in the overhead bin or under your seat. Keeping your belongings with you saves time, protects your valuables, and lets you skip those annoying luggage carousels.

Look for bags that can expand or compress to easily adapt to different airline rules and avoid surprise fees. Soft-sided packs have an edge here, as they can often squeeze into sizing boxes when rigid luggage can't.

A well-chosen, tough, and weatherproof carry-on backpack is your secret weapon. It cuts down on travel hassle so you can actually enjoy your trip, not stress about your bags.