I fly cross country with my 15-month-old at least every six weeks, sometimes more. It was easy when he was in his infant seat, but now that we purchased a big boy car seat, it's almost impossible to lug this thing through the airport. It's so large, that it doesn't even fit through x-ray. It also weighs well over 27lbs. I have to get a car seat that I can manage with just myself and the little one. Can anyone recommend a car seat that is easy to install on airplanes, relatively light, easier to carry, and has a high safety rating?