I'm traveling next week and was wondering the same thing! I have a Pfaff Ambition. I usually tote it around to classes in a Tutto Rolling Tote, but it's too big for carry on. Friend of mine is leanding me her smaller rolling bag that meets the airlines carry-on sizes. Called the airlines (SouthWest) and since I purchased the early boarding, they're pretty sure I'll be able to carry-on and not have to do a last-minute gate-check (but suggested I wrap in in bubble wrap just in case).