Most guests decide in the same order: first the month, then the budget, then the animal they want to see. The boat comes last, and is still what the week is remembered for. Anyone with two weeks in the northern winter almost inevitably ends up in the southern hemisphere; anyone with one week of leave and a need for a direct flight stays in the Red Sea.
For a first liveaboard, look for calm reefs, short crossings and dives without heavy current: Thailand, the northern routes in Egypt and large parts of the Maldives. If you want current and big animals, plan for Galápagos, Socorro or the Brothers routes in Egypt, there, proof of 50 to 100 logged dives is the rule rather than the exception.
Price differences come less from the boat than from the distance. A Red Sea week starts around ¥140,625 on board plus roughly ¥59,375 in flights and ¥62,500 in extras. The same week in Indonesia starts near ¥250,000 on board, with ¥171,875 to ¥218,750 in flights and two travel days at each end. The calculator above adds those layers up for every destination.
Safety standards are part of every serious booking decision since the Red Sea incidents of the 2023/24 season. Look for a visible safety briefing before the first dive, emergency oxygen, a second compressor, a crew with current rescue certification and proof of dive accident insurance as a booking condition. A good vessel names those points unprompted, if the operator page is silent, ask.
Shoulder season pays off when the price advantage outweighs the loss in visibility and the odds of seeing your target species, 20 to 30% cheaper is realistic, but the hammerhead schools at Daedalus only show from May to July, not in December. When in doubt, the season overview above decides, not the price alone.
