Sierra International Airport

Sierra International Airport (IATA: SIX, ICAO: KSIX, FAA LID: SIX) is the primary international airport serving Sierra, Verona and its surrounding metropolitan area. It is the largest airport in Insui by both international and domestic passenger traffic. It is most often referred to by its IATA airport code SIX. The airport is owned by the city of Sierra and operated by the Palm Coast Airport Authority, an inter-county governmental agency of the metro counties which manages the two other international airports in the Palm Coast, as well as three airports only open to domestic air traffic. Sierra International Airport is the primary hub of Air Insui, Premiere Airways, and Sarpedonian Airways, and is a focus city for AirLevantia, DeBonAire Airlines, Northeast Airlines, NYOAC, and Royal Helvianirian Airlines. The airport holds the record for the world's busiest origin and destination airport, since relative to other airports, many more travelers begin or end their trips in Sierra than use it as a connection. It is also the only airport to rank among the top five Cartadanian airports for both passenger and cargo traffic.

While SIX is the busiest airport in the Greater Sierra Area, several other airports, including Bordeaux-Columbia Airport, Lynnhaven-Serenity Airport, Roseland-Pasadena Airport, as well as Gadsden-Samori-Andina and Los Sueños International Airports, also serve the area.