Thailand Ferry Routes: The Complete Guide to Every Major Island Connection

Thailand's two coastlines — the Andaman Sea (west) and the Gulf of Thailand (east) — operate largely separate ferry networks, each with distinct seasonality, operators, and island clusters. Understanding the system prevents missed connections, wasted time, and booking from unreliable operators. Andaman Coast ferry network: the Andaman ferries operate primarily October to May. June to September sees significant disruption from the southwest monsoon — ferries between Phuket and Phi Phi, and southward to Koh Lanta and Koh Lipe, are frequently cancelled in rough weather. Key Andaman routes: Phuket (Rassada Pier) to Koh Phi Phi: 2 hours, 350–500 THB, operators include Andaman Wave Master and Ko Phi Phi Cruiser. 4–6 departures daily in peak season. Krabi (Ao Nang or Ao Nang Pier) to Koh Phi Phi: 1.5 hours, 300–400 THB. Koh Phi Phi to Koh Lanta: 1.5 hours, 250–350 THB. Krabi to Koh Lanta (Ratchada Pier to Saladan): 1.5 hours, 250–300 THB. Trang to Koh Mook, Koh Ngai, Koh Kradan: 1.5–2 hours, 200–350 THB — less visited but beautiful islands. Koh Lanta to Koh Lipe (long southward run): 4–5 hours, 800–1,200 THB, Tigerline and Satun Pakbara Speedboat Club. Hat Yai / Pak Bara to Koh Lipe: 2 hours, 500–700 THB (most common Koh Lipe access route). Gulf of Thailand ferry network: Gulf ferries operate more evenly year-round on the upper routes (Samui, Phangan, Tao). The lower Gulf (Koh Chang, Koh Kood) has a wet season (June–October) with service disruption. Key Gulf routes: Surat Thani (Don Sak Pier) to Koh Samui: 1.5 hours, 200–250 THB. Several daily departures with Raja Ferry and Seatran. Koh Samui (Na Thon) to Koh Phangan: 40 min, 200 THB. Very frequent service. Koh Phangan (Thong Sala) to Koh Tao: 1.5–2 hours, 300–350 THB, Lomprayah. Koh Tao to Chumphon (mainland): 1.5 hours, 500–600 THB. Trat (Laem Ngop Pier) to Koh Chang: 30 min, 100 THB. Very frequent. Trat (Laem Sok Pier) to Koh Kood: 2.5 hours, 350–500 THB. Booking platforms: 12go.asia is the most comprehensive booking platform for Thai ferries — it aggregates multiple operators with real-time availability. Klook and Busbud offer combined bus/ferry packages for major routes. Always check operator websites directly for current season schedules during the shoulder season (April–May, October–November).