How long is the flight to Athens?
The below times are for non stop flight segments to Eleftherios Venizelos International Airport (ATH). From John F Kennedy International Airport (JFK), the flight time is roughly 8 hours and 55 minutes. From Newark Liberty International Airport (EWR), the flight time is roughly 9 hours and 2 minutes. From Philadelphia International Airport (PHL), the flight time is roughly 9 hours and 12 minutes.
Please keep in mind that the above are time in the air; most travel sites will quote a ramp to ramp time which is about a 1/2 hour greater than the air time.