The public bus system in Costa Rica is the cheapest, and often the most convenient way to travel anywhere you want to go. Buses range from flashy old American school buses (or “< ahref=”http://gocentralamerica.about.com/od/glossary/g/Chickenbus.htm”>chicken buses”) to higher-quality express buses with air conditioning–check out Toucan Guides’ Costa Rica bus schedule for times and destinations.
The main hub of bus transit in Costa Rica is the Coca Cola Bus Terminal in San Jose.
If you’re traveling with a good deal of luggage and not visiting any remote areas, it may be worth it to rent a car. Taxis are also widespread, and will take passengers long distances for a price.
If you’re country-hopping, Ticabus is the best way to do it. This comfortable, accommodating bus line runs all the way through Costa Rica, up to Guatemala in the north, and to Panama in the south.
Courtesy of about.com