There are several buses departuring San Jose to Cahuita from 6AM till 4PM. There are additional buses between Puerto Limon and Sixaola which pass by Cahuita. From San José the cost is about $4 and from Limon about $1.50
Taxis from Puerto Limon cost in the region of $15 and from San José costing about $150.
Interbus runs services between Cahuita and San José for around $35pp taking ~3-4hours. See (http://www.interbusonline.com) for details.
