Thanks for all the great suggestions. I have contacted my airline. They said it will not be a problem and will have assistance waiting when we arrive. I'm not so concerned about my mom, but my dad is 81 and very head strong. They are both very active. They don't consider themselves seniors. It's a riot to hear them talk about the groups they go on bus trips with. You would think they are in their 30's! I don't see either one of them getting in a wheelchair, but at least one will be available if they need it. Thanks again!