The cheapest way to get to Monteverde is by bus, but you may also choose to use the Taxi Boat Taxi option if you are coming from “La Fortuna” and Arenal Volcano area.
You may also choose to get a rental car. The roads within Santa Elena are now paved, but only as far as the gas station. The road to the reserve is not paved. Renting a car is thus not such a bad idea, but make sure that is is 4WD and that the spare tyre is in good condition – you may have to use it.
There are also private transportation companies that offer private transfers in a private vehicle. There are also shuttle services that charge around $29.00 per person from anywhere in the country. Be aware that these are not private, and sometimes utilize window vans that are packed like sardines.