There is no legal age requirement for riding in a hot air balloon. However, most companies will have their own age requirement. Young children typically are frightened by the noise from the burners or the high altitudes. Thus, many companies will require children to be of a certain age to ride in a balloon. Each company has its own policies regarding age limits, and you should check with the company from which you are purchasing the balloon flight if there will be young children riding in the balloon.