After landing at the Belize airport, I took a USD 25 taxi to Belize city since there is no public transport to Belize City. At 85$ USD, the tour is expensive, but given the equipment (headlamps, water shoes), the two-hour transportation from San Ignacio to the caves, and the lunch, I think it is justified for this unique experience. But the tour company ( Belize Inland) rebooked me for the afternoon tour.