Don't forget something for her to be chewing on or drinking (bottle) at take off and landing to help with the pressure in her ears. Thats all I have, I have only flown with a 3-4 month old and she slept the whole way. Don't stress about what anyone else is thinking on the plane if DD does make some noise, it can't be helped and you don't want to get stressed trying to keep her too quiet.

Maybe a few new toys to spark her interest and rotate the toys so she does not get bored with them all to quickly.