Are there nonstop flights from Kithira Island (KIT) to Athens (ATH)?

Yes. Sky Express (Greece), Olympic Air fly this route. Flight time is about 44m.

Kithira Island → Athens

Kithira Airport (KIT) to Athens Eleftherios Venizelos International Airport (ATH)・202 km

Nonstop flights available (2 airlines). Flight time about 44m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.