I want my butt to fit nicely in those tiny airline seats!

I spend so much time travelling and hate getting on the plane in hopes no one is sitting beside me so I don't have to squish into that tiny airline seat! It's always a bad thought in my head. My goal is not so much about weight but about shape and size. I've always been very muscular (I'm in a challenge against another coworker of mine who's the same shape and size but weighs 50 lbs lighter than me!!!). Good luck to you all on your weight loss journeys!