My parents were of the generation that dressed up to fly. My first flight (to Cincinnati at the age of 6), I was outfitted in my Sunday best. There is even a home movie of us boarding the plane and then disembarking (things were a LOT different then.) My Dad was really a personal YouTube.
Even as fashion norms have changed over the years, I've always tried to mix comfortable with professional. It really is possible to look nice AND feel good at the same time (without resorting to wearing your pajamas and UGGs).
Some of my favorites:
So don't be "that girl" that everyone is talking about in the airport (for all the wrong reasons)!