Cairo International Airport is the principal international airport of Cairo and the largest and busiest airport in Egypt. It serves as the primary hub for Egyptair and Nile Air as well as several other airlines. The airport is located in Heliopolis, to the northeast of Cairo around fifteen kilometres from the business area of the city and has an area of approximately 37 km2 (14 sq mi). It is the busiest airport in Africa and one of the busiest airports in the Middle East in terms of total passengers.