Update 2023-05-21: According to the source, the SIIFF (Airport and Borders Inspectors Union) has scheduled partial strikes across various airports and border posts in the country until the end of June. At the Humberto Delgado Airport in Lisbon, the strike will occur from 5 am (local time) to 10 am (local time) on Monday (22 May). Additionally, several strikes have also been scheduled for the same time on May 27-29 May, 3-5 June, 10-12 June, 17-19 June, and 24-26 June. Meanwhile, strikes will also occur in Porto, Faro, Madeira, and other SEF units for 24 hours on Monday (22 June) and 29 May, and 5, 12, 19, 26 June.
