David Constantijn Saudale Airport (IATA: RTI, ICAO: WATR), formerly known as Lekunik Airport, is a domestic airport serving Ba'a, the capital of Rote Ndao Regency in East Nusa Tenggara province, Indonesia, and the largest town on Rote Island. The airport is regarded as Indonesia’s southernmost airport and holds strategic importance due to its proximity to the Australia–Indonesia border, which is located just south of Rote. It is named after David Constantijn Saudale, the first regent of Rote Ndao Regency, in recognition of his contributions to both the airport’s construction and the development of the region, while its former name is derived from the village in which it is located. Situated approximately 5 km (3.1 miles) from Ba'a town center, it is the only airport on Rote Island and serves as a primary point of entry to the island. Currently, the airport operates flights to only two destinations: Kupang, the capital and largest city of East Nusa Tenggara, and Savu Island. These routes are served by Susi Air and Wings Air.