In 2026, the cheapest way to travel between Mykonos and Santorini is by taking a large, conventional car ferry rather than the high-speed catamarans. Companies like Blue Star Ferries or Golden Star Ferries typically offer the lowest fares, with "Economy" or "Deck" tickets often priced between €35 and €55 (approx. $38–$60 USD). While these conventional ferries are slower—taking about 3 to 4 hours compared to the 2-hour journey on a SeaJets high-speed vessel—the price difference is substantial, as high-speed tickets often start at €85 to €100. For the absolute best deal, travelers should book at least a month in advance during the 2026 summer season, as early-bird "Special Economy" tickets are limited. Another budget tip is to look for the "local" ferry routes that may run less frequently but offer significantly lower prices for foot passengers compared to the major tourist-oriented express lines.