These values are applied to flights operated by SATA. Flights operated on code-share, the tax fee may change according to the company that operates the flight.
Children under 5 must travel with an adult fare and pay a surcharge for supervision by an assistant. Payment of the fee should be made at the airport on the day of travel.
At the time of reservation, identification and contact information must be provided for the adult meeting the child at the destination airport. In the case of a flight technical stop, the inexistence of an escort previously designated to accompany the children at the transfer station implies boarding refusal.
More information:Children Transportation