Traveled by plane for the first time with our wagon, with our 1 year old, the wagon carried our one year old, our 2 carryons, and our personal items and a car seat through the airport and security. We purchased the travel bag for the express purpose of airline travel, and it is a bit cumbersome to fit into the wagon to carry, it was awesome. Fit all the accessories we wanted to take, ( canopy, tray) the bag has some padding to keep the frame safe, and from getting airplane crust on it. We managed to fit some small items in there as well like a blanket and some comforts for the baby to entertain him while in the wagon. Over all, great experience, great design.