What size backpack can I carry on a plane?

Most major airlines allow carry-on bags up to 22 x 14 x 9 inches. A 35-40L travel backpack typically fits within these limits. Budget airlines in Europe and Asia often have smaller limits, so always check your specific airline. A stuffed backpack can bulge beyond its stated dimensions, so don't overpack.

Is a backpack or suitcase better for flying?

It depends on your trip. Suitcases are easier to roll through airports and better for business travel. Backpacks are better for destinations with stairs, cobblestones, public transit, or rough terrain. For multi-city trips, backpacks are usually more practical. For resort vacations, suitcases win.

Can I use a hiking backpack as a carry-on?

You can if it meets the airline's size requirements, but hiking backpacks aren't ideal for travel. They're top-loading (hard to access items), have external straps that snag on conveyors, and lack features like laptop compartments. A dedicated travel backpack is designed specifically for flying.

How much should I spend on a travel backpack?

Budget options like the Bagsmart Faro ($75) work well for occasional travelers. Mid-range picks like the Osprey Farpoint ($200) offer better comfort and durability for frequent flyers. Premium options like the Aer Travel Pack 3 ($250) add style and top-tier materials. Spend based on how often you'll use it.

Do travel backpacks count as a personal item or carry-on?

Most travel backpacks (30-40L) count as your carry-on, not your personal item. Personal items need to fit under the seat in front of you, which typically means 18 x 14 x 8 inches or smaller. Backpacks under 20-25L can sometimes qualify as personal items on more generous airlines.

Best Travel Backpacks for Flying

The Short Answer

The Osprey Farpoint/Fairview 40L is the best carry-on travel backpack for most flyers. It's comfortable, well-organized, and fits in overhead bins. For a premium urban option, the Aer Travel Pack 3 balances style and function perfectly. Budget travelers should look at the Bagsmart Faro 29L at just $75.

Why a Backpack Instead of a Suitcase

Suitcases are great on smooth airport floors. They're terrible on cobblestones, stairs, trains, and anywhere without an elevator. A travel backpack frees your hands, navigates any terrain, and often fits in tighter spaces on buses and budget airlines.

The trade-off is comfort. A loaded backpack on your back is harder work than rolling a suitcase. But modern travel backpacks have solved most of that with hip belts, framesheet suspension, and load lifters borrowed from hiking pack technology.

Best Overall: Osprey Farpoint/Fairview 40L

Osprey has been making backpacks for decades, and it shows. The Farpoint (men's) and Fairview (women's) use LightWire frames, load lifters, and breathable framesheet suspension that make 40 liters feel lighter than it is. These are the packs that outdoor gear nerds and frequent travelers keep recommending because they just work.

At $200, they're not cheap, but Osprey's All Mighty Guarantee covers damage and defects for the life of the product. The front-loading panel opens like a suitcase, so you're not digging through a top-loading hole. Lockable zippers, compression straps, and an internal laptop sleeve round out the features.

The 40L size is the magic number for carry-on travel. It's large enough for a week or more of clothes and small enough to meet most airline carry-on size limits. Just be careful on strict budget airlines that measure precisely.

Best for: Most travelers who want comfort, durability, and carry-on compliance.

Best for Adventurers: Cotopaxi Allpa 50L

The Allpa 50L is for travelers who need maximum capacity. The standout feature is the removable 8-liter top compartment that detaches to become a sling-style daypack. Pack your main bag for the flight, then pull off the daypack for exploring your destination.

At 50L, this is too large for carry-on on most airlines, so plan to check it or remove the daypack section to reduce the size. The internal organization is excellent, with multiple compartments that keep gear separated and accessible. Cotopaxi's colorful designs make it easy to spot on a luggage carousel.

Best for: Adventure travelers, multi-week trips, and anyone who wants a built-in daypack.

Best Urban/Business: Aer Travel Pack 3

The Aer Travel Pack 3 looks like it belongs in a boardroom, not a hostel. At $250, it balances style and function better than any other travel backpack. The 1680D Cordura nylon is virtually indestructible, and the design is clean and professional.

It's not too heavy, fairly priced for its quality, and extremely comfortable despite its streamlined appearance. Dedicated laptop compartment, shoe pocket, and water bottle pocket hit all the practical marks. If you're traveling for business or just prefer a polished look, this is the one.

Best for: Business travelers and anyone who wants a backpack that doesn't look like hiking gear.

Best Lightweight: Tortuga Travel Backpack Lite

The 4th-generation Tortuga Lite is for travelers who've learned that the best travel backpack is the one you barely notice on your back. It's stripped down to essentials: lightweight materials, minimal padding, and a focus on keeping weight low without sacrificing organization.

This is the minimalist's dream. No excess pockets, no unnecessary features, just a well-designed pack that carries your gear comfortably. Digital nomads and ultralight travelers love this approach.

Best for: Minimalist packers, digital nomads, and ultralight travelers.

Best Budget: Bagsmart Faro 29L

At $75, the Bagsmart Faro punches way above its price point. It won't match Osprey's suspension system or Aer's premium materials, but it handles weekend trips and short vacations perfectly well. The 29L size works as a carry-on on every airline, including the strict budget carriers.

If you fly a few times a year and don't need a pack that'll survive 200 travel days, this is smart money.

Best for: Occasional travelers and anyone on a tight budget.

Choosing the Right Size

20-25L: Personal item size. Good for day trips and ultra-minimalist one-bag travel. Fits under the seat in front of you.
25-30L: Weekend getaways and short trips. Carry-on compliant everywhere.
30-35L: One to two weeks abroad. Enough for most travelers who pack efficiently. Carry-on compliant on major airlines.
35-40L: The carry-on sweet spot. Maximum space while still fitting in overhead bins on most airlines. May get flagged on strict budget carriers.
40-50L: Multi-week trips and adventure travel. Often too large for carry-on, plan to check it.

Features That Actually Matter

Front-Loading vs. Top-Loading

Front-loading packs open like a suitcase with a full panel zip. You can see everything and grab what you need. Top-loading packs make you dig from the top down. For travel, front-loading wins every time.

Hip Belt

A good hip belt transfers weight from your shoulders to your hips. Essential for packs over 30L or if you're walking significant distances. Some packs have removable hip belts for when you don't need them.

Laptop Compartment

Should be padded, separate from the main compartment, and ideally against your back (not the outside of the pack where it's vulnerable to impacts).

Lockable Zippers

Zippers that accept a small padlock deter casual theft in hostels, buses, and crowded areas. They won't stop a determined thief, but they prevent opportunistic grabs.

Airline Carry-On Size Limits to Know

Most major US airlines allow carry-on bags up to 22 x 14 x 9 inches (56 x 36 x 23 cm). European budget airlines like Ryanair and EasyJet are significantly smaller. Asian airlines vary. Always check your specific airline's limits before flying, and remember that a stuffed backpack can exceed its stated dimensions.