Mykonos airport (JMK) has rather basic amenities considering the traffic island gets during the summer months and Qatar Airways recently started flying to there too.
There is a small cafe inside the airport and another one across the parking lot. If you happen to fly on British Airways or Qatar and are eligible to lounge access, there is now updated lounge that is also open for Priority Pass members.
The Priority Pass app indicates that the lounge closes for winter season on October 4. The stand that Goldair had at the airport indicated that it had reopened this year on April 4. The opening hours are from 8AM to 11:30PM daily.
The lounge is bit difficult to find because it is not on the airside. It is on the second floor with the airline offices and you need to clear security after exiting the lounge before going to the boarding gates. The lounge entrance is left to the domestic gates on the second floor.
Food & Beverage:
We probably spent roughly 30 minutes in the lounge and the service from the lady manning the entry desk was good and I chatted with her for a while. The food to the lounge is provided by a well known hotel on the island (CAVOTAGOO).
Overall, considering the options around the airport (very limited) I wouldn’t mind spending the time waiting for the boarding inside the lounge.