Strike action is due to take place at Portuguese airports from Saturday 13th to Tuesday 17th May 2017.
The strikes, which are being help by security guards in airports across Portugal, may cause delays.
Passengers travelling during this period are advised to make allowances for the additional time it may take to go through security control and to check-in luggage.
You can view the government’s travel advice for Portugal in full here: https://www.gov.uk/foreign-travel-advice/portugal