We got this simple little contraption a few years ago and it has made traveling with kids a cinch. The Go Go Kidz attaches to a children’s car seat to turn it into a stroller. No need to check your stroller and carseat. Just strap your child in and make the long journey through the airport. Then simply check it at the gate, pick it up when you land, and then the wheels screw off and you have your carseat ready to install in your rental car.
Traveling with kids is hard enough, simplifying the whole process made flying with small kids super easy.