The SNPVAC union, which represents civil aviation flight personnel, has pledged to join the general strike on Wednesday (3 June). Its president Ricardo Penarroias told Portugal's Jornal de Negocios the action by its members could affect up to 500 flights.
The action will primarily affect Portugal's national carrier Tap, although easyJet said it expected "some disruption" to its flying programme. Ryanair, by contrast, told The Independent it doesn't expect any disruption to its schedule and would operate as normal.
