Port workers in Greece are set to participate in a 24-hour work stoppage on 1 May, as part of May Day.
Delays and cancellations are expected and passengers are advised to contact their ferry company for further information.
Rail services in Greece, including the Athens suburban railway, will be suspended for 24 hours on 1 May.
Public and private sector trade unions have announced their participation in a 24 hour general strike later in the month on 11 May. Public transport may be disrupted as a result.
