Arenal Airport (IATA: FON, ICAO: MRAN) is an airport serving La Fortuna, a district in San Carlos Canton, Alajuela Province, Costa Rica. The airport is named after the Arenal Volcano, one of the major tourist attractions in the country.

Arenal Airport is a private-managed airstrip, currently served by daily flights from Quepos and the capital city, San José. Located in the countryside 7 kilometres (4.3 mi) east of La Fortuna, it can be reached by Route 141.