The international carry-on size restriction is 22” x 14” x 9” give or take an inch. A 40L travel backpack falls perfectly into this category making it ideal for air or land travel. Here are a few of our favorites:
Osprey Farpoint 40L Travel Backpack
Stubble & Co The Adventure Bag
Thule Subterra 34L Travel Backpack
NOMATIC 40L Travel Backpack