The action will see workers employed by baggage handler Portway strike over 26-28 August, affecting Portugal’s four main airports – Lisbon, Porto, Faro and Funchal.
Unions, though, have called off separate action by civil aviation workers over 19-21 August amid a row over pay, conditions and safety.
Talks had been due to take place earlier this week to negotiate a minimum level of service to be maintained throughout the first of the two strikes.
