"Carry-On Only" refers to a travel strategy where individuals pack all their belongings into a single carry-on bag, avoiding checked luggage. This approach can save time at the airport, as travelers can bypass the check-in and baggage claim processes. It also reduces the risk of lost luggage and often leads to lower airline fees. Travelers who choose the "Carry-On Only" method typically focus on packing essentials and versatile clothing. This strategy encourages efficient packing and helps maintain organization throughout the trip. Many airlines, including Delta and American Airlines, have specific size restrictions for carry-on bags, so it's important to check these guidelines before traveling.