Most airlines offer free gate check-in for strollers, so they will be placed on the plane with more care than luggage checked before security. If you want, you can purchase a stroller bag to protect it. (Most brands, like UPPAbaby, sell stroller bags that are specifically designed for their travel strollers.) While there is no way to guarantee that your stroller will remain undamaged during flights, purchasing a durable, high-quality travel stroller is your best bet for prolonging its shelf life.