My wife and I will be heading to Negril in December with a 16 month old. There are some great videos online about flying with kids. Different ways to buckle a car seat on the airplane or how to use a harness if doing the lap seat. We opted to buy a seat to make the flight more enjoyable. One tip was to vacuum seal diapers. Our driver Kingsley Jame of Take Care Tours can do car seats. This is our first time flying with a child if anyone has more tips please let us know.