According to media reports, at least 166 flights were canceled in Lisbon alone.
Strikes are taking place at the airports of Porto, Faro, Funchal and Porto Santo due to employee dissatisfaction with wages.
It is assumed that the promotions will run until Sunday.
Earlier it was reported that the aircraft of the Aeroflot company, performing the flight Moscow - Lisbon, returned to the Russian capital airport at 21:31 Moscow time.