Kythnos Airport

There is no airport in Kythnos.
The nearest airport is the Syros National Airport, while the nearest international one is the International Airport of Athens. Both Syros and Athens are connected with Kythnos via ferry.
From Athens, one can reach Kythnos by taking a ferry from Piraeus or Lavrio. The second lies closer to both the airport and Kythnos. To save time, you can book your airport transfer in Athens online.

Santorini also hosts an international airport. From the port of Athinios in Santorini, there are ferries to Kythnos in the high season.
You can take a taxi or bus to go from the airport to the port. Alternatively, you can book your Santorini airport transfer online.