get ready you are in for a fabulous time! Might as well just go from the International BZE (Goldstone) since you'll be flying into there anyway. You go through customs and take a 20 minute flight on a puddle jumper by Tropic Air or Maya Air. This short flight over the reef is just gorgeous...I look forward to it every time!

You could take a taxi from BZE to the municipal for a similar flight but it's not that much cheaper usually.

You could take a water taxi from Belize City to the island (about an hour) but I think the plane ride is a highlight of the trip. Try it at least once!