Sometimes the airlines have specials.
There are two water taxi companies providing service between Ambergris Caye and Chetumal:
a) San Pedro Water Jets International:http://www.sanpedrowatertaxi.com/index.html
b) San Pedro – Belize Express:http://sanpedrobelizeexpress.com/index.html
Trip time: 90 minutes.
Fare: US$30 one way, US$55 round trip.
Despite what their websites state, this is the information I have received directly from the water taxi companies.
When daylight saving is in effect in Mexico, SP Water Jets departs Chetumal at 3:30 pm Mexico time (2:30 pm Belize time), and SP-B Express departs Chetumal at 4:30 pm Mexico time (3:30 pm Belize time).
In Chetumal, water taxis use the main pier, “Muelle Fiscal”, which is close to the big Government building, “Palacio Gobierno”, at the waterfront. Both companies have offices at the pier.
Check the information on my BelizeBus site because there is a map of Chetmal showing the location of the pier:http://belizebus.wordpress.com/