Three destinations divide the diving here: the bay islands right off Ao Nang, Phi Phi, and the King Cruiser wreck with Shark Point and Anemone Reef, which lie out towards Phuket. The same centres sell snorkelling places on the same boats, so a mixed group does not have to split up.
Where do the boats go, and what does each direction cost?
The bay islands are the short day and the cheapest entry to two dives. Phi Phi costs more because of the crossing, not because of the dives. The wreck trips are the longest day of the three, and at Railay Dive Center the number of dives depends on your certification rather than on the price.
A first try dive, or the whole course?
A try dive buys two supervised dives in the sea: Sawasdee Divers prints ฿3,900 (about $108) for two dives at the local islands and caps the group at two people per sea dive, with the pool session a separate ฿2,100 line; Krabi Scuba Club charges ฿4,500 per person at the local islands and ฿5,900 at Phi Phi.
A course is three days and ends in a certificate — ฿14,500 (about $402) at Local Diving Krabi, ฿15,500 at The Dive Ao Nang for a group of no more than four.
Why do half the prices not say who they are for?
Because the operators' own price lists do not say. Local Diving prints “Local Islands (2 dives) — 2,900 Baht”, The Dive Ao Nang “Phi Phi Islands : 2 Dives — 3,500.00 THB”, Kon-Tiki gives ฿4,000 (about $111) for two dives and ฿4,800 for three in its calendar, and none of them names a unit.
A group cap of four students is a teaching ratio, not a billing unit, so it does not settle the question either — confirm the unit when you book rather than assuming per head.
What is worth checking before you book?
- Certification: Railay Dive Center gives “two or three dives depending on certification level”, and the King Cruiser wreck itself needs Advanced Open Water.
- Who else is on the boat: Sawasdee prices a companion riding as a passenger separately, and Aqua Vision takes snorkellers on the same speedboat.
- Park surcharges for divers are counted differently: The Dive Ao Nang lists ฿200 (about $6) per person per day for diving plus a ฿400 entrance valid three days, while Sawasdee collects the fee only if the rangers come aboard.
- Rental: a dive computer is ฿300 (about $8) at Local Diving and Sawasdee, a full set with computer ฿500 at The Dive Ao Nang, nitrox ฿250 a tank.
- The free pick-up zone ends at Ao Nang: Local Diving charges ฿400 (about $11) for Krabi Town, Khlong Muang, Tub Kaek and Railay, and The Dive Ao Nang does not serve Krabi Town or Railay at all.
Important
the park fee sits outside every price above and is paid in cash in baht on the day. The department's announcement puts the island zone at ฿400 (about $11) per adult and ฿200 per child, while several operators state ฿200 and ฿100 — ask your centre which figure it will collect before you sail.