AIRDO Co., Ltd. , previously known as Hokkaido International Airlines , is a Japanese regional airline headquartered in Sapporo, Japan. It operates scheduled service between the islands of Honshu and Hokkaido in cooperation with All Nippon Airways, from its hubs at New Chitose Airport in Sapporo and Haneda Airport in Tokyo.

Haneda Airport , sometimes referred to as Tokyo-Haneda, is one of two international airports serving the Greater Tokyo Area, the other one being Narita International Airport (NRT). It serves as the primary base of Japan's two largest airlines, Japan Airlines and All Nippon Airways, as well as RegionalPlus Wings Corp., Skymark Airlines, and StarFlyer. It is located in Ōta, Tokyo, 15 kilometers (9.3 mi) south of Tokyo Station. The facility covers 1,522 hectares of land.