How early should I arrive at Shimojishima Airport?

Shimojishima Airport (SHI) on Shimojishima Island serves as a compact regional gateway in Okinawa Prefecture with a single terminal handling both domestic and limited international services. The airport is a base for several smaller carriers and charter operators, offering scheduled flights to major cities in Okinawa and occasional connections to Tokyo and other Japanese hubs, as well as seasonal international charters. Travelers can check the online flight board (オンラインフライトボード) for real-time arrivals (到着) and departures (出発), and should allow extra time for island transfers, car rentals, and limited on-site services.