DS is no longer in a car seat on the plane, and I'm looking for a comfortable travel pillow for him. Also, he did complain at the end of the 2 hour flight of his bottom hurting from sitting down. In nearly 5 years of taking the car seat on the plane, DS has never complained about being uncomfortable, and that includes 14+ hours to Australia. Sigh, I knew I was going to miss the car seat...he's just not as comfortable without it.