A TAP source told Lusa that the protest “has no impact whatsoever on the operations”.

Union leader, Maria Luís Martins, said all six workers scheduled to work at the two counters were on strike between 12:00 and 14:00 and would not be doing any overtime at the Porto airport desks.

The counters are used for irregularities such as charge for baggage excess and reissuing tickets, and for ticket sales.

The strike means no staff is on duty between 12:00 and 14:00 and no overtime will be worked after 23:00.