M.C.
Hi!
When I flew with my two year old to Wales we brought lollipops for the ears! The little dum dum ones worked well. The best thing we had on the plane was the dvd player and even while we were there because she could hang out and watch one of her shows in the morning just like at home. I brought playdoh as well, they sell the little containers of it which are easier for packing. I always found that my daughter rose to the occasion when I was nervous about traveling with her.
Safe travels!