I am a firm believer in installing the carseat on the plane, for two reasons. 1.) They are trained from birth to sit in the carseat. So if you little one seems to have a motor and will prefer to parquor the plane seats, installing the carseat will prevent any discussion about how we need to stay in the seat, because they already know. 2.) I've seen the way that luggage handlers treat the luggage and if a carseat is checked then the handling process definitely should count as an accident, many accidents probably and is probably not structurally safe for use in a car in case of an accident after being checked. So I scoured the webs and found this carseat that is for travel only. It is the LIGHTEST weight narrowest carseat that is FAA approved for airlines, we attach it to the top of our carry on size rolling luggage with this strap. I install it on the window seat, then install it right into the rental car that we pick up at the airport. When he was even smaller and couldn't keep up around the airport we had these wheels to make the carseat its own stroller and pulled him around, he loved it and so did everyone we walked by. He looks pissed off here because its early, I swear he loved being pulled around.