E. L. Tordesillas Airport (Filipino: Paliparan ng E. L. Tordesillas) (IATA: BSI, ICAO: RPLE), also known as Balesin Airport, is a private airport serving Balesin Island, an island under the jurisdiction of Polillo, Quezon but currently occupied and operated by Alphaland Corporation as a membership resort.

It is named after the island's original owner Edgardo Tordesillas.

[3] The runway is paved with concrete, and has a length of about 1,500 meters.

[3] The airport is currently served by charter flights for resort guests.

Its constructed at a certain angle to redirect freshwater to nearby reservoirs and ponds.