Practices regarding transporting pram vary according to the airline. For this reason, you should check the information and regulations from the airline preferably well in advance or during check-in.
Pushchairs and prams that will go in the plane’s hold must be packed in a protective bag and according to the airline's instructions. Some airlines offer passengers a protective bag at check-in.
If you have to leave your own pushchair at check-in, little passengers can continue their journey in the terminal using a pushchair provided by the airport.