Yes you can fly Nature Air from La Fortuna Arenal domestic airport to Liberia international airport located in northern Guanacaste to get to the NW Pacific beaches. This is the fastest route to get to the NW Pacific Beaches from La Fortuna and the Arenal area. The La Fortuna airstrip is small and located only a few miles outside of the town of La Fortuna. Taxis are readily available to transport you into La Fortuna , only a few miles , and the rest of the area around the Arenal Volcano.
The domestic air carrier Nature Air flies out of Pavas where it’s main terminal and headquarters is located. Which is approx 5 miles from downtown San Jose., Costa Rica’s capital city. The airport is named Tobias Bolanos Airport in Pavas. From San Jose International Airport to the Tobias Bolanos airport takes about 30 minutes by taxi and should cost you around $20.00. If you get a transfer by Nature air they will charge you twice as much, around $40.00 Go on the web and check Nature Air’s schedules and fares www.natureair.com
Also you can fly from Liberia international airport to La Fortuna Arenal. Check Nature Air’s schedule www.natureair.com