In short
Two tickets, never one: the boat, then the site entry (€20, reduced €10) paid on the island — it is not sold on board. The best departure is Plaka (10-15 min, ~€10-12 return, every 30 min); Elounda if you're staying there; Agios Nikolaos as a mini-cruise (1h+, €25-40). Entry rose from €8 to €20 on 1 April 2025 — +150%, the steepest Cretan rise of the reform: guides and blogs still showing €8 predate it. Closed Tuesdays in winter.