The Foreign and Commonwealth Office (FCO) have updated the travel advice for Greece with an update to the Summary – Greek trade unions have announced a series of strikes that could cause disruption to a number of domestic flights until 8 October and international and domestic flights on 9-10 and 12-13 October. The relevant extract of the advice is below for your reference:
Summary
Greek trade unions have announced a series of strikes that are expected to cause disruption to a number of domestic flights until 8 October and international and domestic flights on 9-10 and 12-13 October. Contact your airline or tour operator if you intend to travel on those dates.
There are regular strikes, sometimes called at short notice, that can cause disruption to public transport (including air travel and ports).
The overall level of the advice has not changed. There are no restrictions within the advice.
View the travel advice in full here: https://www.gov.uk/foreign-travel-advice/greece