I'm not the expert on travel but I will say, I've learned a few things traveling overseas.
First of all, airplanes can be super cold. I remember on our way back to Chicago from London a few years ago with my parents + grandparents, it was absolutely freezing on the airplane. As in, it was freezing. I promised myself then and there I would never again travel without a jacket. A scarf is a great addition, too.
Flats: super comfy + easy to slip-off at security checkpoints.
Cute tote that holds my essentials which are: chapstick, lotion, wet wipes, make-up, Nook [Bible, books, games], notebook + writing utensil, mints, candy.
Can't wait for the next time I take an airplane trip...it will be with Leon. :)