- Ulithi Airport, also known as Ulei Airport, is a small airstrip located in the Ulithi Atoll of Yap State in the Federated States of Micronesia. It serves as the main airport for the Ulithi islands, which are part of the outer islands of Yap. The airport has a single runway and operates a limited number of domestic flights to other islands in the Micronesia region. The airport is primarily used for private and chartered flights, as well as occasional medical evacuation flights.