Gavin was around 2 the first time he flew on a plane. He was pretty excited to be on a plane, so that kept him occupied for a while. Just bring some toys, and if she loves the signing dvd, I recommend getting the portable DVD player. Gavin had one for both the trip to Florida and the trip to Jamaica, and he loves it. Gives him something to do. =]

PS: I just did a search on Walmart.com and they have a portable DVD player for $70, and one with a case for $80. Might be something to look into. =]