Solaseed Air is a Japanese regional airline headquartered on the property of Miyazaki Airport in Miyazaki, Miyazaki Prefecture, Japan. It operates services mainly between Honshu and destinations on the island of Kyushu and Okinawa Prefecture.

The airline was established as Pan Asia Airlines in 1997 as the fourth airline established in a deregulated Japanese market. In August 1998, the airline's corporate name was changed to "Skynet Asia Airways Co., Ltd." before operations commenced in July 2002 as Skynet Asia Airways. The airline rebranded as "Solaseed Air" in July 2011, and the change of its legal corporate name to "Solaseed Air Inc." followed in December 2015.

In May 2021, Solaseed Air and Air Do announced their intentions to merge as a result of operating difficulties during the COVID-19 pandemic. The new holding company for both airlines, RegionalPlus Wings, was officially established on October 3, 2022.

Solaseed Air's head office is on the second floor of the Miyazaki Airport Building (宮崎空港ビル, Miyazaki Kūkō Biru) in Miyazaki, Miyazaki Prefecture, Japan. Its headquarters previously occupied different facilities in Miyazaki City, including the SNA Center (SNAセンター SNA Sentā) in the Again Building (アゲインビル, Agein Biru) in Miyazaki.

As of May 2021^[update], Solaseed Air operates or has operated scheduled services to the following destinations in Japan:

In October 2015, the airline operates two return charter flights to Taipei from October 17 to October 20, marking the first regional airline to operate international flights.

Solaseed Air has codeshare agreements with the following airlines:

In addition to the aforementioned codeshare partners, Solaseed Air has interlining agreements with the following airlines: