Air Do

Hokkaido International Airlines, known by its brand name Air Do (ICAO: ADO), is a Japanese regional airline that specializes in connecting the island of Hokkaido with major cities across Japan.

Hokkaido International Airlines was founded in 1996 by Hokkaido entrepreneur Teruo Hamada, commencing flight operations in December 1998 under the "Air Do" brand. Its establishment aimed to offer a low-cost alternative to major domestic carriers on routes between Hokkaido and Tokyo, following domestic airline deregulation. The company's legal name officially changed to AIRDO Co., Ltd. on October 1, 2012. In May 2021, Air Do announced its intention to merge with Solaseed Air, leading to the formation of a joint holding company, RegionalPlus Wings Corp., in October 2022 to strengthen regional operations.

The airline's operational base is in Sapporo, Japan, with its primary hub at New Chitose Airport (Sapporo) and a secondary hub at Tokyo's Haneda Airport. Air Do operates an exclusively domestic route network, serving 11 destinations within Japan as of November 2025. Its routes predominantly link regional airports in Hokkaido, such as Hakodate, Asahikawa, Obihiro, Kushiro, and Memanbetsu, to key cities on Honshu Island, including Tokyo (Haneda), Sendai, Nagoya, Kobe, and Fukuoka.

Air Do maintains an all-Boeing fleet, comprising 12 aircraft as of November 2025. This includes 8 Boeing 737-700 narrow-body aircraft for shorter, high-frequency routes and 4 Boeing 767-300 wide-body aircraft for higher-capacity services. All aircraft are configured in an economy-only layout, featuring a distinctive blue-and-yellow livery adorned with illustrations of the airline's polar bear mascot, BearDo. While Air Do is not a member of a global airline alliance, it operates in close cooperation with All Nippon Airways (ANA), including codeshare agreements on its flights. Air Do offers a frequent-flyer program called "My AIRDO" and emphasizes "Hokkaido Hospitality" with services such as spacious seating, complimentary beverages like green tea and apple juice, and an in-flight shop selling BearDo merchandise.