The only way from Sifnos to Piraeus is by ferry. You should expect to be able to find tickets starting around $225, if you search flights from Serifos to Piraeus. Ferry from Sifnos to Piraeus, it will get you there soon enough!
On your trip from Sifnos to Piraeus, it is best to book as soon as possible. It won't necessarily help reduce your price by a large amount, but will ensure that you have a spot on the bus or train.
|Cheapest Way||Ferry — $225|
|Fastest Way||Ferry — 9h 35min|
|Eco-Friendly Way||— 999999 lb CO2|
|Available Modes||1 modes — ferry|
|Travel Companies||Aegean Speed Lines|