Like other Fukuoka City Subway lines, stations are equipped with automatic platform gates, and trains are automatically operated by ATO system.

However, JR train cars (from Chikuhi Line) are operated manually.

This is the only subway line in Japan that directly links to an airport.

The Kūkō Line goes through many important areas of the city, namely Nishijin, Tenjin, Hakata, and the airport.

A fleet of six new 305 series 6-car electric multiple unit (EMU) commuter trains was introduced on through services to and from the Chikuhi Line from February 2015.