I always book window seats. (I like to see out the windows) I am paranoid about motion sickness and in my mind I don't feel like I have to deal with it if I sit next to the window. So my choice would be sitting next to the baby. No big deal.....I might be able to help the mother. I have helped young mothers in the past with screaming babies. (I have had 2 babies of my own so far, so I have been there.) I know little tricks that works with most babies.