Dinny: I would guess it would be no problem but haven't traveled with it yet. I think it is the new maximum size for some airlines, 22 x 14 x 9, (Continental for one) but it is supposed to keep its shape when fully packed which is probably not true for a duffel bag. I plan to practice packing it this weekend and I will measure the dimensions then. Of course, since Mike has actually carried it on, he would know best... probably why you directed your questions to him. I am not sure why I am trying to answer your question.