Not all duffel bags are small enough to fit into an overhead storage bin, especially if you are like us and you stuff them as full as is humanly possible. For our review guide on the best duffel bags of 2021, we made sure to indicate whether each bag is suitable for carry-on and well as checked travel in the description area. But it is possible to decide for yourself which bags are suitable, as long as you look for bags that are durable and convenient.