Costa Rica’s international airport, Juan Santamaría (SJO), is actually in Alajuela, about twenty minutes from San José. Taxis are available immediately outside the airport, and will transport travelers to the capital for a set rate of approximately $12 US. Take only licensed range taxis with Taxi Aeropuerto on the side. If you prefer to tour the city (and country) independently, you may choose to rent a car at the airport.
As Costa Rica’s entire public bus system is centered in Downtown San Jose, you can get from here to any part of the country very easily. Even if you are in Costa Rica for just a few days, there are many trips that one can take from San José. Visit the active Poás Volcano and Irazú Volcano, with a few national parks nearby as well.
A local bus stop also sits outside the airport, the beginning of Costa Rica’s extensive and inexpensive bus system. Buses vary from higher-class, air-conditioned vehicles to less fancier buses. Most only accept colones. The main bus terminal in San José is called the Coca Cola Bus Terminal, though times and destinations may vary.
Taxis are readily available throughout the city, and tourist-class vehicles like minibuses can be booked from numerous tour agencies.
International bus lines Ticabus (+506 221-0006) and King Quality (+506 258-8932) have terminals in San José, for travel to other Central American countries. Book a couple days early to ensure a seat.