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Travel · 5 compared

Best Travel Backpacks for International Travel of 2026: 5 Compared for Security & Carry-On Fit

By Best Pick Guide Editorial Team · Updated

An international trip asks more of a backpack than a weekend away. You carry it through long security lines, crowded train stations and late-night transfers, with your passport, cards and laptop inside. And many airlines outside the US are stricter about cabin bag size, and some weigh it.

Generic carry-on backpacks fall short in two places: zippers anyone can open while the bag is on your back, and sizes that only work for one airline's rules.

We compared five travel backpacks for international trips, from a small personal-item pack to a full 45-liter carry-on. One locks every compartment, resists cuts, has an RFID-blocking passport pocket, and still carries comfortably on a hip belt.

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Our top pick Pacsafe EXP45 Anti-Theft Carry-On Travel Pack
  • Lockable anti-theft zippers
  • RFID-blocking passport pocket
  • Hip belt for long transfers
See it on AmazonOpens Amazon.com in a new tab

Which one is right for you?

How we compared them

At a glance

ProductLockable anti-theft zippersRFID-blocking passport pocketHip belt for long transfersLink
Pacsafe EXP45 Anti-Theft Carry-On Travel Pack✓✓✓See it
Peak Design Travel Backpack 45L✗✗✓See it
Cotopaxi Allpa 42L Travel Pack✓✗✓See it
Pacsafe Venturesafe EXP35 Anti-Theft Travel Backpack✓✓✗See it
Osprey Daylite Expandable 26+6 Travel Pack✗✗✗See it

Our picks

Best Overall
#1
P

Pacsafe EXP45 Anti-Theft Carry-On Travel Pack

  • Lockable anti-theft zippers
  • RFID-blocking passport pocket
  • Hip belt for long transfers

A 45-liter carry-on built around security: both main compartments lock, the fabric and straps have a steel mesh inlay against slashing, and an RFID-blocking pocket holds your passport and cards. A hip belt carries the weight.

  • Puncture-resistant, interlocking zippers on both main compartments that take a padlock (not included)
  • Cut-resistant straps and fabric with a steel mesh inlay, plus a removable anchor strap to lock the bag to a fixed object
  • RFID-blocking pocket for passport and cards; padded sleeve fits a 16-inch laptop
  • Suitcase-style opening, adjustable hip belt and sternum strap; 5-year Pacsafe warranty
  • 21.7 by 13 by 7.5 inches: right at the common 55 cm height limit, so don't overstuff it on strict airlines
  • 3.97 lb empty, which counts against airlines that weigh carry-ons
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Most Adaptable
#2
P

Peak Design Travel Backpack 45L

  • Hip belt for long transfers

A one-bag travel pack that expands from 35 to 45 liters, with a weatherproof 400D recycled nylon shell, top, side and rear access, and straps and a hip belt that tuck away when you check it or slide it into an overhead bin.

  • Expands from 35 to 45 liters, so it can shrink for stricter airlines
  • Weatherproof 400D recycled nylon canvas shell with #10 UltraZip zippers
  • Tuck-away shoulder straps and hip belt; luggage pass-through and 360-degree handles
  • Top, side and rear access, plus expanding side pockets
  • No lockable or anti-theft zippers and no RFID pocket are stated in the listing
  • Dimensions, weight and warranty not stated in the listing
See it on Amazon
Best Suitcase-Style Packing
#3
C

Cotopaxi Allpa 42L Travel Pack

  • Lockable anti-theft zippers
  • Hip belt for long transfers

A suitcase-style travel pack with a full-wrap zipper, lockable zippers on the main opening, a 15-inch padded laptop sleeve, and a hip belt designed to take the weight off your shoulders.

  • Lockable zippers on the main opening
  • Full-wrap, suitcase-style opening with large, medium and small internal pockets
  • Tuckable shoulder straps and hip belt, designed to transfer weight to the hips
  • Side, top and bottom grab handles plus a roller-bag pass-through strap
  • Laptop sleeve fits up to 15 inches, smaller than the Pacsafe's 16
  • No RFID pocket, and dimensions, weight and warranty not stated in the listing
See it on Amazon
Best for Strict Airlines
#4
P

Pacsafe Venturesafe EXP35 Anti-Theft Travel Backpack

  • Lockable anti-theft zippers
  • RFID-blocking passport pocket

A smaller 35-liter version of the Pacsafe idea: self-locking, puncture-resistant zippers, cut-resistant fabric, an RFID-blocking top pocket, and a hidden lockable laptop compartment, at 20.5 inches tall and 3.33 lb.

  • Self-locking, interlocking, puncture-resistant zippers that also take a padlock
  • Cut-resistant straps and fabric with a lightweight steel mesh inlay
  • RFID-blocking top pocket; secret lockable 16-inch laptop compartment against your back
  • 20.5 by 9.8 by 7.9 inches and 3.33 lb; 5-year Pacsafe warranty
  • 35 liters is tight for more than about a week without laundry
  • No hip belt is listed, only shoulder straps and a sternum strap
See it on Amazon
Best Personal Item
#5
O

Osprey Daylite Expandable 26+6 Travel Pack

A light pack sized to meet the personal item dimensions of most major airlines, so it goes under the seat on basic fares. It expands 2 inches for 6 more liters when you need it.

  • Listing says it meets international personal item dimensions for most major airlines
  • 16.9 by 13 by 6.3 inches and only 1.85 lb
  • Main compartment expands 2 inches for 6 extra liters
  • AirScape ventilated back panel, tech sleeve and luggage pass-through
  • 26 liters, 32 expanded: a second bag or a very light packer's only bag
  • No lockable zippers, RFID pocket or hip belt listed; expanding it can take it past personal item size
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Why Pacsafe EXP45 Anti-Theft Carry-On Travel Pack is our #1 pick

Every compartment locks

Both main compartments on the EXP45 have puncture-resistant, interlocking zippers you can padlock together. In a crowded metro or a long boarding line, nobody is quietly opening your bag while it's on your back.

Built to resist slashing

The fabric and straps have a steel mesh inlay to resist cutting, and a removable anchor strap lets you lock the bag to a chair or luggage rack. These are the threats that zippers alone don't stop.

Your passport has its own safe pocket

An RFID-blocking pocket holds your passport, cards and ID. With a padded 16-inch laptop sleeve and a hip belt, it's one bag you can trust for a full day of travel.

See Pacsafe EXP45 Anti-Theft Carry-On Travel Pack on Amazon

What to look for

Check size and weight, not just size

Many international airlines have smaller cabin limits than US airlines, often around 55 by 40 by 20 cm, and some weigh carry-ons, commonly at 7 to 10 kg. An empty bag weighing 4 lb uses part of that. Check your airlines before you buy.

Decide how much security you want

Lockable zippers stop casual pickpockets. Cut-resistant fabric and straps protect against slashing. An RFID-blocking pocket protects cards and passport chips. Only the Pacsafe packs here have all three.

A hip belt matters on long transfers

Walking between terminals or across a city with 20 lb on your back is much easier when a hip belt carries the load. Tuck-away belts keep it neat when you put the bag in an overhead bin.

Buy for your strictest airline

If your trip includes a budget or regional airline, size for that one. An expandable bag, or a smaller pack like the EXP35, gives you room to comply on the strictest leg.

FAQ

What size backpack can I take on an international flight?

It depends on the airline. Many international airlines allow around 55 by 40 by 20 cm, a little smaller than the common US limit of 22 by 14 by 9 inches. Check each airline on your trip and pack for the strictest one.

Do anti-theft backpacks really work?

They make you a harder target. Lockable zippers stop quick grabs from a bag on your back, and cut-resistant fabric stops slash-and-grab theft. They don't replace common sense, like keeping the bag in sight and in front of you in crowds.

Do I need an RFID-blocking pocket?

It's a small extra layer for passports and contactless cards. It doesn't cost you anything in use, and it gives your documents a dedicated, secure pocket so you always know where they are.

Is 45 liters too big for a carry-on?

Some 45-liter packs are designed to meet common carry-on sizes, but only when they're not overstuffed. On strict airlines, use compression straps or the expandable setting to keep it within limits.

Bottom line

For international travel, the Pacsafe EXP45 is the backpack to buy: lockable compartments, cut-resistant fabric, an RFID passport pocket and a hip belt, backed by a 5-year warranty. Choose the Peak Design 45L if you want an expandable, weatherproof one-bag pack, the Cotopaxi Allpa 42L for suitcase-style packing with lockable zippers, the Pacsafe EXP35 for strict airlines, and the Osprey Daylite Expandable as a personal item on basic fares.

Get Pacsafe EXP45 Anti-Theft Carry-On Travel Pack on AmazonOpens Amazon.com in a new tab

Also consider

  • Peak Design Travel Backpack 45L Most AdaptableSee it
  • Cotopaxi Allpa 42L Travel Pack Best Suitcase-Style PackingSee it

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