Smaller duffle bags are ideal for air travel, and most airlines will let you carry them onboard as your free personal item. Just make sure you can squash it under the seat in front of you.

Absolutely, a duffel bag can be an excellent choice for travel, particularly for trips that involve multiple modes of transport or rugged terrain where traditional wheeled suitcases struggle. Modern "travel duffels" are often designed with backpack straps, durable weather-resistant materials, and internal organization compartments that make them much more versatile than the old-fashioned gym bag. They are particularly popular for adventure travel, safaris, or boat trips where storage space is tight, as their soft-sided nature allows them to be squished into overhead bins or small lockers. However, the downside is that a heavy duffel can be taxing on your shoulders if it lacks wheels, and your clothes are more prone to wrinkling compared to a structured suitcase. If you choose a duffel, look for one with "daisy chain" loops for external attachments and a U-shaped zipper opening, which provides easier access to your belongings than a single straight zipper down the middle.