In the majority of cases, a duffel bag won't be considered a personal item, as they usually exceed the typical maximum size of 18 x 14 x 8 inches or 45 x 35 x 29 cm. However, they will often be classed as a carry-on bag, if they are within the average limit of 22 x 14 x 9 inches or 56 x 36 x 23 cm.

Yes, a duffle bag can absolutely count as a carry-on, provided its dimensions fit within the airline's specific size limits—typically 22 x 14 x 9 inches (56 x 36 x 23 cm). Duffle bags are often favored by frequent flyers because their "soft-sided" nature allows them to be squished into tight overhead bins or under-seat spaces more easily than rigid rolling suitcases. However, the lack of a frame means you must be careful not to "over-stuff" them; if the bag bulges beyond the allowed dimensions, it may be rejected by a gate agent and forced into the hold for a fee. For 2026, many "travel duffles" (like those from Patagonia or North Face) are specifically designed with 40L to 45L capacities to match standard carry-on regulations. If you use a small, gym-sized duffle, it may even qualify as a "personal item" that fits under the seat in front of you, potentially saving you a carry-on fee on low-cost airlines.