Carry-On Baggage Tips Planning a trip? Thinking about carrying on your luggage? If so, here are a few tips for you: Think Small… The maximum size carry-on bag for most airlines is 45 linear inches (the total of the height, width, and depth of the bag). Anything larger should be checked. No oversize packages or luggage can be stowed onboard. Think Smart… Plan to check more of your baggage and carry on less. Check with your airline before packing to determine its carry-on guidelines regarding the number of items you may carry on and the maximum size of those items. In certain situations the airline may require most or even all of your bags to be checked, so be prepared to do so. Think Safe… Carry-on items which may fall from overhead bins can injure you or other passengers during flight or in the event of an emergency evacuation. Stow heavy items under the seat in front of you, not overhead. Don't stack items in the overhead storage bin. If an emergency evacuation is necessary, leave your carry-on items on the plane. Retrieving personal items may impede the safe evacuation of passengers. Remember, be safety conscious when stowing your carry-on items.